Toward A Fake Flash Drive Free World – No More Counterfeits – No More Data Loss

H2testw 1.4 – Gold Standard In Detecting USB Counterfeit Drives

Posted by KittyFireFlash on September 2, 2008

H2testw 1.4 has proven itself to be the best of breed for detecting counterfeit Flash drives. It is extremely easy to use and proves detailed information. Created by Harald Bögeholz, the interface is in German but has the option to run in English. It is free and standalone.

New!  This article contains a poll you can vote on.

Nothing is installed into the operating system. Designed for Windows it can run under Linux if Wine is installed. It will not run under Macs as it is a Windows Software . If your computer can not run the software – ask a colleague or friend who has a windows based computer to help you test.  However if you are a Linux or Mac user we have good news for you,  keep reading. A software has been developed based on the idea of H2testw,  just for you.

To learn more and for download information

Sections covered:

  • Gold Standard rating for H2testw 1.4 Why do you give this software such a high rating?
  • Results for a 64GB USB drive purchased on eBay, using H2testw 1.4
  • Results from H2testw have been verified on drives detected as fakes
  • Acknowledgements
  • Download Links
  • Note To Flash Drive Sellers

Gold Standard rating for H2testw 1.4? Why do you give this software such a high rating?

We give H2testw 1.4 the highest rating and recommend it for testing counterfeit USB Flash Drives for the following reasons:

  1. Easy to Use
  2. While in German an English Execution is possible
  3. Stand alone executable file – no installation required to run it
  4. You do not need administrator privileges on a computer to run it
  5. Tested to work on 1.1 and 2.0 USB drives
  6. Tested to work on 1.1 and 2.0 USB Ports
  7. Tested to work to analyze drives advertised as 4GB, 8GB, 16GB, 32GB and yes …64 GB capacity.
  8. Reports seen capacity – what the operating system sees size to be.
  9. Will write 1 GB files up to the reported size – requiring no work on your part except patience if it is a large drive and a slow computer
  10. Will read all the files it wrote and verify them
  11. Will produce a report. a) short if all is well b) detailed if there issues found.
  12. The program is offered free

The readme.txt file provides:

  • Explanation of the program and what it does for general computer users
  • Information on how to interpret the results
  • Technical information for those who have a deeper understanding of data storage and file writing and for the skeptics out there. Output results can easily be copy pasted into notepad to be saved as a text file.

Test results for a 64GB USB drive purchased on eBay, using H2testw 1.4

Sample Output For A Fake 64 GB Drive

The media is likely to be defective.
3.8 GByte OK (8084847 sectors)
58.6 GByte DATA LOST (122921617 sectors)
Details:710.5 KByte overwritten (1421 sectors)
7.6 MByte slightly changed (< 8 bit/sector, 15630 sectors)
58.6 byte corrupted (122904566 sectors)
710.5 KByte aliased memory (1421 sectors)
First error at offset: 0x000000003cef8470
Expected: 0xeb7ac43a237c5170
Found: 0xeb7a843a237c5170
H2testw version 1.3
Writing speed: 9.24 MByte/s
Reading speed: 10.8 MByte/s
H2testw v1.4

This is 4GB USB flash drive not a 64GB USB flash drive. It is of poor quality. As 4GB drive it should be about 3.9 GB not 3.8 GB formatted. This indicates in low level formatting a lot of bad sectors had to be locked out. Usually flash chips like these are rejected for major brands and should be destroyed. Unfortunately instead of the furnace flames these chips are leaving the back door of factories to be resold. These chips are a favorite for counterfeiters to reprogramme. Low cost, big profit.

The results from H2testw have been verified on drives detected as fakes. How?

  1. Drives were dissembled
  2. Controller chips identified
  3. Flash chip identified

Searches on the actual flash drives using their identification number revealed their true capacity. These matched the output from the H2testw Program.

In a few cases, when drives were disassembled, epoxy glue removed holding the flash drive to the bottom casing, quality control stickers were found with a size circled. The size? Exactly what H2testw reported as the capacity it could write to. All drives autopsied for investigation and validation of this program were purchased on eBay.

We do not see any other program that can match these features. Therefore, H2testw has been adopted as the Gold – Standard to detect and test fakes.

eBayers use this program to PROVE they have received a fake from a seller. It is confirmed with more eBayers reporting the same results for the same drive model. We have been able to prove this repeatedly, to the point we have only one conclusion. If a drive model fails capacity testing with H2testw then any for that listing on eBay is a fake. Having more eBayers test the same model only confirms what H2testw reported. The autopsies on counterfeit drives have also proven the value of this program. The report is a God send for eBayers who must file disputes. It gives them evidence to submit with their case.


To Herald Bögeholz who wrote the Program H2testw, Thank You!
To c’t Magazin für Computertechnik, Thank You!
To for hosting the download of the programme, Thank You!

People around the world who have suffered the misfortune to receive a Counterfeit Flash drive are grateful for your contribution in the struggle against False Capacity USB Flash Drives and memory cards.

Mac Users:

Linux Users:

Download links For Windows Users:

Using Google translation into English

Article Manipulated data loss caused by USB sticks – Heise Online

H2testw 1.4 Website – English

Note: Using translation can slow down access speed of the web pages.


H2testw 1.4 Website – German – Direct Site Access

You may prefer to search with Google for the software. Type in H2testw 1.4 which is the current version at the time of listing on this page. To search all versions you can just type in H2testw.

Direct Download Of Software For version 1.4 of H2testw

Note To Flash Drive Sellers

Please test your merchandise using this software. Do not offer for sale unless the drives are able to pass testing. You do not want to face the consequences of angry buyers. If you have drives which fail, contact the source you acquired from. Submit the proof you have as evidence for receiving counterfeit merchandise.

If the drives you offer for sale are able to pass the testing of H2testw 1.4 – congratulations!

Please indicate this in your advertising or listings. Let prospective buyers know that you have tested. That your drives pass with the program and that you are able to guarantee the true advertised capacity (minus a small overhead for operating system file formatting.). This will increase your sales potential.

If you find the tool H2testw 1.4 useful to you, please return and leave a comment on your experiences with it.

420 Responses to “H2testw 1.4 – Gold Standard In Detecting USB Counterfeit Drives”

  1. […] on Kingston Counterfeit Fake 32GB DataTraveler 150 USB Flash Drive Found On eBay by John OzanichComment on Fake Sony 32GB 64GB 120GB 360GB 500GB Micro Vault USB Flash Drives Available on eBay! by …Comment on Fake Sony 32GB 64GB 120GB 360GB 500GB Micro Vault USB Flash Drives Available on eBay! by […]

  2. […] on Kingston Counterfeit Fake 32GB DataTraveler 150 USB Flash Drive Found On eBay by John OzanichComment on Fake Sony 32GB 64GB 120GB 360GB 500GB Micro Vault USB Flash Drives Available on eBay! by …Comment on Fake Sony 32GB 64GB 120GB 360GB 500GB Micro Vault USB Flash Drives Available on eBay! by […]

  3. cpam said

    one more 😦 from pandachinchin ( ebay from china )
    Warning: Only 15983 of 15984 MByte tested.
    The media is likely to be defective.
    1.9 GByte OK (4067312 sectors)
    13.6 GByte DATA LOST (28665872 sectors)
    Details:0 KByte overwritten (0 sectors)
    0 KByte slightly changed (< 8 bit/sector, 0 sectors)
    13.6 GByte corrupted (28665872 sectors)
    0 KByte aliased memory (0 sectors)
    First error at offset: 0x000000007c1fe000
    Expected: 0x000000007c1fe000
    Found: 0x0000000000000000
    H2testw version 1.3
    Writing speed: 11.9 MByte/s
    Reading speed: 11.9 MByte/s
    H2testw v1.4

  4. Linda Billstein said

    Hi, I jut bought a 64GB memory stick and I was trying to test with h2testtw. It seems it took a long time. I saw at one stage in the writing box the information like:

    1685 MByte
    58:49 min (36:26:50H)
    488 KByte/s

    Does it mean the test will take about 36 hours?
    Thank you to explain it to me.

    Linda Billstein

  5. Linda Billstein said

    Hi, how long does it really take to test 64GB flash drive using this software (h2testw). I just put mine and I saw this info in the writing box:

    1685 MByte
    58:49 min

    Does this mean the test will take about 36 hours to complete?
    Thank you for your assistance.

    Linda Billstein

  6. kittyfireflash said

    Hi Linda,

    Testing a very large usb flash drive can take a long time. If a fake, the program will test it’s advertised size and that means attempting to write those 1GB files to nonexistent space. Must depends on whether you have the usb flash drive in a 1.1 usb connection or a 2.0 connection and the speed of your computer and so on. Your transfer rate is extremely low, and if you are not using an ancient computer (pentium II or III) this is a very bad sign. If you are using a 1.1 usb port it will be a lot slower. Testing an 8GB fake on a pentium II with 256 RAM and 1.1 usb port can take up to 4 hours for the full testing. That includes, writing, reading and verifying. We recommend running the program in the late afternoon and overnight for large usb flash drives – when the computer isn’t needed. While interesting to watch it can get boring.

    So it may well be 36 hours for the test to complete in your case. The bigger the size the longer it takes and if you are using an old 1.1 usb port a lot longer. Let us know the final results and times.

  7. Linda Billstein said

    Thanks, Kitty. I just tested about 2.5GB today and yes, I’ve got the bad news as well 😦
    I just wondered why there still so many of these fake USB 64GB being bid or sold at ebay (in my case ebay Australia). It’s exactly the same like what I’ve got, Kingston, green colour, 64GB and…defective…

  8. cpam said

    Something interesting, you see my previous post for my test!
    I open my drive today and inside is :
    Hynix H27UAG8T2MTR 16Gb MLC 4K 3.3V x8 x16 2008-04-17

    I have done little research and chip H27UAG8T2MTR is 16GB USB2.0?????
    Any ideas why the test comes with such result?

  9. InspectorTech said

    To Cpam

    The confusing thing for most of us is the difference between little “g” and big “G”. Lowercase g means gigabit, Uppercase G means gigabyte.

    To make a byte, you need 8 bits. So when you see 16g you need to divide by 8. In your case 16/8 = 2GB. That is in line with your test results, a two 2GB flash chip.

    See the decoder information at:

    Also visit Hynix site for nand flash chips at:

    currently at the bottom of this page you will see GB’s for MLC and above Gb’s. You will see they produce a 256Gb. Divide that by 8 and you get? 32GB for the maximum chip size, but we don’t see it currently being offered and used. That would probably be very expensive at the moment.

    It can be confusing but it is very important to check the difference of whether capacity of a chip is stated as GB or Gb, it makes a big difference.

    The best thing to do is go to the manufactures site to see if you can decode. If they don’t have the information, send them an email with the chip serial you have and the capacity testing results and ask them about the real capacity. In some cases they may tell you the chip does not exist (Grade D) or they will point out the bits and bytes difference.

  10. cpam said

  11. Miroslav Hrženjak said

    Bought on ebay auction from ‘apealy’
    The media is likely to be defective.
    1.9 GByte OK (4014016 sectors)
    14.0 GByte DATA LOST (29521984 sectors)
    Details:0 KByte overwritten (0 sectors)
    0 KByte slightly changed (< 8 bit/sector, 0 sectors)
    14.0 GByte corrupted (29521984 sectors)
    0 KByte aliased memory (0 sectors)
    First error at offset: 0x000000007a7f8000
    Expected: 0x000000007a7f8000
    Found: 0x0000000000000000
    H2testw version 1.3
    Writing speed: 4.86 MByte/s
    Reading speed: 10.1 MByte/s
    H2testw v1.4

  12. Randy said

    For Linda Billstein

    If you have a counterfeit Kingston Flash Drive, you may be able to prove it is counterfeit by asking Kingston. Here is a link to their verification site.

    Why I said you may be able to prove it is counterfeit is that it may not have come in a standard Kingston package with a UPC and serial#. If it does not have a UPC / serial number that is a good indication of a counterfeit.

  13. Linda Billstein said

    Thanks, Randy. Will visit Kingston web soon. Mine has a serial number and at the back of the packaging, it has the web name of and also However, after I tested about 2MB, it gave me a report that this USB was defective.

  14. RichyOR said

    The media is likely to be defective. Details:
    1.9 GByte OK (4100032 sectors)
    0 KByte overwritten (0 sectors)
    0 KByte slightly changed (< 8 bit/sector, 0 sectors)
    14.0 GByte corrupted (29435968 sectors)
    0 KByte aliased memory (0 sectors)
    First error at offset: 0x000000007d1f8000
    Expected: 0x000000007d1f8000
    Found: 0x0000000000000000
    Writing speed: 14 MByte/s
    Reading speed: 15.1 MByte/s
    H2testw 1.2

  15. Rafael Silva said

    My test has ended fine, I just bought my pen drive from Ebay too, like almost everyone here. Lucky me that it is with the real capacity.

    Warning: Only 1392 of 15367 MByte tested.
    Test finished without errors.
    You can now delete the test files *.h2w or verify them again.
    Writing speed: 8.71 MByte/s
    Reading speed: 18.1 MByte/s
    H2testw v1.4

  16. InspectorTech said

    Hi Rafael,

    It looks like you only did a partial test, not the full pen drive. Is it because you already had data on it? Normally the procedure is to test an empty flash drive, or whatever space is left if you can’t. A partial test, especially under 2GB is not good as a rule. Most fakes have about 2GB, some 4GB and the high end up to 8GB. Please let us know more about your testing details.

    If you got a real 16GB on eBay, we would like to know who the seller is. Everyone keeps asking SOSFakeFlash for sellers who sell the real capacity. There have not been any nominations for almost two months. We only have three sellers on record. Two are not selling pen sticks at the moment. That is a very poor showing.

    Everyone, it doesn’t add up well. Given how many pen drives and memory cards and MP Players are sold on ebay – there must be some good sellers even if few. Where are they?


    Please report in to SOSFakeFlash if you know of real sellers, with the information and the prices paid. That could help determine more on what fakes cost verses real capacity cost on ebay. Real sellers need to be found and if they are validated SOSFakeFlash would be happy to list them as good sellers.

  17. cpam said

    One more thing i just notice, most sellers selling usb pens are keeping they sells private????

  18. James said

    Hello, People!

    I find this blog very interesting and I owe you a lot in my quest to the perfect cheap MP4 player. I’ve just received a 16GB MP4 player bought from Ebay. Here are the results of h2testw after testing the nandflash-based MP4 player twice:

    Warning: Only 15753 of 15804 MByte tested.
    The media is likely to be defective.
    15.3 GByte OK (32261120 sectors)
    512 KByte DATA LOST (1024 sectors)
    Details:512 KByte overwritten (1024 sectors)
    0 KByte slightly changed (< 8 bit/sector, 0 sectors)
    0 KByte corrupted (0 sectors)
    512 KByte aliased memory (1024 sectors)
    First error at offset: 0x0000000264a10000
    Expected: 0x0000000264a10000
    Found: 0x0000000226b10000
    H2testw version 1.3
    Reading speed: 5.47 MByte/s
    H2testw v1.4

    Just 512 KByte DATA LOST (1024 sectors). So what do you think? I think it is not by any standard a high-quality product, but does it make it a fake?

  19. Randy said

    The authors of H2testw should consider releasing and publishing the code under an open source license.

    Allowing more programmers to review the code would improve the overall credibility of the program and allow the development of improvements.
    They should also consider using a download site that promises that all download software has been tested and does not contain viruses. Some people may be concerned that the present download site does not indicate that that such is the case.

  20. InspectorTech said

    About H2testw

    If I remember the story correctly, the reason H2testw was developed in the first place was because a computer magazine had a promotion give away. Unfortunately, the usb flash drives were? Fakes. You can imagine how they felt and their readers felt about it. Their response was? To develop a programme that people could use to test their flash drives. This was a few years back.

    The program has been improved over time and is now currently at version 1.4

    It is copyrighted, the author’s right, given all the hard work and effort involved.

    It is offered free by the site as a public service, their contribution against this flase capacity trafficing. In terms of validating the results reported by the programme, many people have pried open their fake flash items afterwards and decoded the flash chip used for storage. Then searched the internet for the chip and sure enough, over and over again the chips used matched what the software reported.

    The readme file does talk about do’s and don’ts and more on the technical aspects. At the moment it is the most accurate program out there, it’s report is also easy to save and use as evidence.

    We are not aware there have been downloads with viruses. People should never ever unzip any file or anything downloaded without first running through an anti virus scanner.

    Programmes that are capable of interacting with hardware can be flagged with false positives – the anti virus programme alogrthymes are hyper sensitive some times – the odd thing is one might report it while the others don’t and that can be an indication of false positive. The best thing to do is check the message reported by the anti virus software on the internet and ask the anti virus software provider about it.

    The programme does not need adminstrator rights to run, but it is possible that some computers are in severely restricted mode (almost lock down)- if people have done this, it is possible that a computer might not like the programme.

    What we have seen is some people do not pay attention in the drive letter they select to test. It does not auto detect the usb drive letter. Normally you will see removable device with the drive letter. But if people have already performed “experiments” on the device, on occasion this will not be seen as such.

    If using windows, people should use the explorer first to see the drive letters and which one is for the usb flash device. And PAY ATTENTION! One can always right mouse click on the drive letter to select properties to check the size (reported capacity).

    There are other tools and software we don’t talk much about at the site that are not bad, but very difficult to use. Certain repair tools are not mentioned precisely because if used by an inexperienced or occasional computer user, they are dangerous if not used properly.

    H2testw is not a dangerous programme. And we have not had anyone report in that the download contained viruses. Not yet anyway.

    If someone has the technical background and time to develop a testing programme that is open source that would be nice and interesting. It is a heavy commitment – time wise now and into the future.

    We hope or dream of the day when this digitally altering of flash chips will stop and be a footnote in history.

    Unfortunately so long as people want to pay cheap prices, there will be those willing to disguise bicycles as cars.

    It’s been mentoned recently that part of the blame should fall on buyers and one person mentioned greed (buyers). We see that as being true in some cases, but mostly people are just not aware of the true costs of flash chips. They make the wrong assumptions – they are cutting out the middle men. Most of us had this assumption and that is how we became victims. We paid moderate prices, but not cheap with free shipping thrown in.

    Several of us see a new danger coming. Not right now but in a year or two. If this fake flash reprogramming is not stopped, it could potentially spill over into the new emerging SSD (solid state disk) technology. The technology is very similar. Once it is accepted widely, prices drop and OEM’s move in, it could become the next target. So much R&D and effort has been invested, we just hope the major companies involved with this technology will ensure it not be possible. But if the tools from Fab’s have leaked into the blackmarket (what is used to programme chips and size) what will prevent the software tools used for SSD preparation from also sneaking out the back door?

    Everyone who buys flash chip based devices needs to test their items before using. H2testw is the best in our view for this at the moment.

    If you discover you have a false capacity item, you need to fight back. Not just because YOU are a victim, but to add your voice and efforts to stop it. Right now it is usb flash drives, MP Players, memory cards. But if not checked and halted it could escalate to the new storage devices of the future. Currently people are losing data – files. Imagine losing hard disks and all there is on them – once you exceed true capacity?

    This goes much deeper than anyone ever imagined.

    Protect yourself. Test.

  21. […] H2testw 1.4 – Gold Standard In Detecting USB Counterfeit Drives […]

  22. Angelo said

    I got it my computer, but I don’t exactly how to set everything up for testing.

  23. kittyfireflash said

    Just download the software, click on the exe file, choose the drive letter where the usb flash drive is located. Chose the english interface, then chose to test the whole drive with read, write and verify. Save the report results in a text file. It is that easy. See the readme file for more details, it is that easy. Depending on the capacity see by an operating system and also your pc machine and whether you have a 1.1 or 2.o usb connection you might like to have it run over night. It will test the advertised capacity. In this article samples of output have been provided.

  24. Angelo said


    I think I might have figured out how to use the H2testw 1.4 test not sure. I purchase a 4GB Sony Conterfeit Memory Stick about 2 yrs. ago and I new it was conterfeit from the packaging and the looks of the card comparing to E-Bay guides & some other sources I’ve seen in 0comparisons for the authentic and conterfeit side by side but last night 5/25/09 I thought I’d give it a shot and here’s what I did. I first formatted the Pro Duo Memory stick with my computer (not guick) format but (regular format) then placed it inside my computer and when the window for H2testw came up I selected all available space it says 3875MByte (suppose to be a (4GB) Pro Duo Memory Stick. It shows up as removable disc E\ the computer. So I selected target E\Removable Disc, and I doing this right so far? Then here’s the test results

    Writing Verifiying
    3875 MByte 3875 MByte
    43:34 min. 29:40 min.
    1.48 MBytes 2.18 MBytes

    Test Finished without any errors.
    You can now delete the test files H2w2 or verify them again.
    Writing Speed 1.48 MBytes
    Reading Speed 2:18 MBytes
    H2testw 1.4

    Seems to me my (4GB) Sony Memory Stick Duo is supposed to be a (4GB)card that’s only 2GB am I correct on this from the way I’m reading it? Please respond!

    Also I’d like you to know that in China & Hong Kong they also conterfeit the Motorola cell phone headsets all over E-Bay, I ended up with one of those and after careful research and just being able to tell by the packaging and the way it’s placed in the box and the fine product details itself that it was conterfeit, let the seller know, they got scared, offered me an immediate refund and even a prepaid shipping label to print out and sent the headset back to them. Then I went on Amazon and purchased an authentic one. The conterfeit Motorola headsets with Motorola’s brand name and conterfeit packaging is flooding E-Bay, so those you have to watch out for also. Now I’m receving a Chi-Pod and it’s on the way and I’d like some help on how to get started on the setup to run the test on that when it get’s to me. I’d appreciate any help anyone can give me, but first tell me if I’ve done this test correctly.

    Thanks for your response!

  25. Angelo said

    Yes but look in the end where it says 2.17 GB? It’s packaged as a Sony Pro Duo Memory Stick, and notice it shows that it started with 3.78GB and on the very last line it only shows 2.18? Doesn’t that mean that it’s only in the end a 2GB card or am I reading this the wrong way? This is definitely a counterfeit card because I found out a couple yrs. back because of the packaging. It verifies still at the 3.78 GB in the end but ends off at 2.17GB so doesn’t that mean it’s fake and only like a 2GB card. How do you tell?

    Also when you get the brand new MP3 player some people are going over at ( and using that site’s disc utility formatting tool so I don’t know whether to test it with HStestw 1.4 first or go over and format the player on that other site because if you format it at ( then wouldn’t it read the true capacity when you first go over and format using the tool over at that site and then return to do the test at the H2testw site? That other site reformats the player and returns it to read it’s true capacity and removes the hack so what would the purpose be of testing it on this site do after it’s formatted. Should you test it on this site before it’s formatted when you first get it with the demos that come on it, because usually a brand new MP3/4 player will come with a song or video or 2 and I don’t know if people are formatting on Windows or formatting first on before doing this test or doing this test with the demo material on the player and then going to the other site to format afterward? Not unless people that go to don’t know of this site because removes the hack and then shows the true capacity and then if you came over to this site to do the test then it should read the true capacity over here after formatting over at the other site am I correct. So I just recieved my MP3 player today in the mail, haven’t had a chance to open it up yet because I’ve been out today. Do you recommend testing unformated? Is that how people do it on this site because even at this site it tells you to format before doing the test so basically if your going to format over and dehack over at then when you test over hear it should test at the true capacity am I right? Don’t forget to let me know also about that memory stick, how could it be a 4gig? when it ends off at 2.17? It verifies at the original 3.78GB but I noticed the Gigabytes just stood there stagnent at about half way of the bar and didn’t move any more after half of the way it was verifying back. So it verified back at the same it stared with the same 3.78 and while the megabytes were going up and filled in the end to the original 3.78 and only showing 2.17GBs in the very last line, wouldn’t that mean that this card is only 2GB or is it I’m reading it the wrong way. Don’t forget to let me know if people are just sticking there new MP3 players to the test or formatting them first. I don’t know if this site actually take out the hack like the other site maybe it just formats and shows the fake capacity, what would you think?

    Thanks for your response!

  26. Angelo said

    Hmmm, I just realized in the end on that last number was megabytes and not Gigabytes. So does that mean becauase the card veryfied at 3.78 it’s truly a 4GB card? Is that where you would tell if it was fake at the top number in both start and veryified columns? Not unless I typed it wrong? What would a fake show and which line would you look for for the low fake output?


  27. InspectorTech said

    To Angelo

    I just finished a test using H2testw 1.4 on a memory card. It is a true 2GB and the output looks like this:

    Test finished without errors.
    You can now delete the test files *.h2w or verify them again.
    Writing speed: 2.51 MByte/s
    Reading speed: 8.59 MByte/s
    H2testw v1.4

    Your final results were:

    Test Finished without any errors.
    You can now delete the test files H2w2 or verify them again.
    Writing Speed 1.48 MBytes
    Reading Speed 2:18 MBytes
    H2testw 1.4

    Looks a bit different from the output that is auto generated by the programme.

    The interface does not present the final size as part of the report if it is good, only in the programme window panel. The 2.18 MByte/s is the speed of reading the files generated by the programme not the size of the card.

    The size can be found if you are using windows, by right mouse clicking on the drive letter once the test completes and usually will present in GB – gigabytes.

    You can not test a card that has not been formatted. If it is unformatted, files can not be written to the card.

    In the case of a 2GB the final size in my test was 1.89 and in yours if it is 4GB, then a quick 2x 1.89 would be? 3.78GB.

    Therefore there is nothing wrong with the card. One should never use a low level formatting programme from any site, for a usb flash based device – unless there is an issue of size. So one uses a programme like H2testw 1.4 to find out what the size is. If it has a serious disagreement with what is stamped on the memory card, then one can look at ways to fix it.

    HP Tools is good at resetting memory card sizes. The next thing you should do, is check the specifications of your digital camera. Older camera’s may have a limitation on the largest size of card they will accept. In some cases they will simply format to what it can accept. Therefore, it is always best to test your card, with the programme before using in a camera. Also you can verify with a reset using HP Tools if your camera lowered the capacity.

    Sample output of fakes is provided on this post. And there are even more for the report a fake page that buyers put in. I don’t have any “fake” memory cards available as I will only buy them at a reputable store locally.

    I learned my lesson on eBay with fake usb flash drives. Whether memory cards, MP Players, or usb flash drives, the report format is the same. The only difference is depending on the fake the section

    First error at offset: 0×000000003cef8470
    Expected: 0xeb7ac43a237c5170
    Found: 0xeb7a843a237c5170

    will be different depending on the item. Very much a DNA footprint. Very useful inspecting a report on an item being fake.

    You might have a “counterfeit” knock off, Angelo, but is it a fake, false capacity? What happens in your camera? Can you take 3.78 GB of photos? And if you have issues…what about in another camera that used the same type of card?

  28. Miroslav Hrženjak said

    Bought on ebay auction from ‘’
    The media is likely to be defective.
    3.8 GByte OK (8122088 sectors)
    11.7 GByte DATA LOST (24613144 sectors)
    Details:0 KByte overwritten (0 sectors)
    0 KByte slightly changed (< 8 bit/sector, 0 sectors)
    11.7 GByte corrupted (24613144 sectors)
    0 KByte aliased memory (0 sectors)
    First error at offset: 0x00000000f7ddd000
    Expected: 0x00000000f7ddd000
    Found: 0x0000000000000000
    H2testw version 1.3
    Writing speed: 7.58 MByte/s
    Reading speed: 10.6 MByte/s
    H2testw v1.4

  29. Tedster said

    Warning: Only 3728 of 4032 MByte tested.
    The media is likely to be defective.
    0 KByte OK (0 sectors)
    3.6 GByte DATA LOST (7634944 sectors)
    Details:0 KByte overwritten (0 sectors)
    0 KByte slightly changed (< 8 bit/sector, 0 sectors)
    3.6 GByte corrupted (7634944 sectors)
    0 KByte aliased memory (0 sectors)
    First error at offset: 0x0000000000000000
    Expected: 0x0000000000000000
    Found: 0x00000000aa55aa55
    H2testw version 1.3
    Writing speed: 19.3 MByte/s
    Reading speed: 14.0 MByte/s
    H2testw v1.4


    4GIG MY A**E !

  30. kittyfireflash said

    To Tedster

    And who might the seller be? It is good to see test results but doesn’t help a lot of it is not reported in to us with the report a fake tab info. We can’t clean up the POOP without help.

  31. […] (la página esta en alemán, aunque en SOS Fake Flash hay información en inglés): Esta disponible en alemán e inglés, se puede descargar desde este […]

  32. Ben said

    Bought a “16GB” Mp player from ebay seller Safe2Star
    Ran H2testw on it and after about 50 minutes, got the error “device location error” and the device is now stuck on the loading screen whenever i turn it on. My guess is corrupted flash. Any ideas or tips how to fix this? By the progress of the test, it was really looking like it was gonna be an 8GB.

    Any help would be greatly appreciated

  33. […] H2testw 1.4 – Gold Standard In Detecting USB Counterfeit Drives […]

  34. An said

    Hi all 🙂
    Bought a 16gb flash drive. Looks like this one:
    Now I know this model is fake very often. Anyway, it works well. But I only used like 20kb of the stick, I deleted this and used H2testw:

    The media is likely to be defective.
    3.6 GByte OK (7745251 sectors)
    11.9 GByte DATA LOST (24961309 sectors)
    Details:1.5 KByte overwritten (3 sectors)
    21.5 KByte slightly changed (< 8 bit/sector, 43 sectors)
    11.9 GByte corrupted (24961263 sectors)
    1.5 KByte aliased memory (3 sectors)
    First error at offset: 0x000000000c5b8430
    Expected: 0xa5d024449e991130
    Found: 0xa5d024441e991130
    H2testw version 1.3
    Reading speed: 5.30 MByte/s
    H2testw v1.4

    So it's less than 4gb… Hope I get my money back

  35. SUCKER 999999 said


    Name of seller and company

    What you bought
    1.8″ LCD 16GB OGG 4th Gen MP3 MP4 Media Player 16 GB 5H

    How long you have used the flash device
    2 DAYS
    hether they are local (only ship within a country) or International

    Your buying experience, why you are proposing them.
    I bought a 16gb mp4 player from “emma_sun_wu” hoping it was a good deal and it was a FAKE! Unit is really only 1.8gb!

    The media is likely to be defective.
    1.8 GByte OK (3830528 sectors)
    13.7 GByte DATA LOST (28884224 sectors)
    Details:6.8 GByte overwritten (14442112 sectors)
    0 KByte slightly changed (< 8 bit/sector, 0 sectors)
    6.8 GByte corrupted (14442112 sectors)
    0.5 KByte aliased memory (1 sector)
    First error at offset: 0x0000000074e60000
    Expected: 0x0000000074e60000
    Found: 0x857a8c7043425355
    H2testw version 1.3
    Writing speed: 2.49 MByte/s
    Reading speed: 8.28 MByte/s
    H2testw v1.4



  36. Shali said

    Error reading file ‘D:\2.h2w’, offset 0x3de00000.
    (The system cannot find the file specified. Code 2)
    The media is likely to be defective.
    1.9 GByte OK (4084864 sectors)
    19.4 MByte DATA LOST (39808 sectors)
    Details:0 KByte overwritten (0 sectors)
    0 KByte slightly changed (< 8 bit/sector, 0 sectors)
    19.4 MByte corrupted (39808 sectors)
    0 KByte aliased memory (0 sectors)
    First error at offset: 0x000000007ca90000
    Expected: 0x000000007ca90000
    Found: 0x0000000000000000
    H2testw version 1.3
    Writing speed: 3.40 MByte/s
    Reading speed: 16.9 MByte/s
    H2testw v1.4

    This result is for a 16GB pen drive from China

  37. […] any flash chip used in usb flash drives, memory cards or MP Players is to use a free program called H2testw. The old fashioned way, is to take the item apart. Then decode the usb controller chip and the […]

  38. […] any flash chip used in usb flash drives, memory cards or MP Players is to use a free program called H2testw. The old fashioned way, is to take the item apart. Then decode the usb controller chip and the […]

  39. Alex said

    another fake 16GB SDHC card:

    Ebay seller: fashionzhou (no longer registered as of a few days ago)
    item: New 16GB SDHC SD Secure Digital Memory Card 16 Go 16 GB.220444093619

    h2testw reported only 1.9GB are fine

  40. Hans Klardie said

    I just sent a note to Pay Pall after they requested me to send a so called 16 gb card back to the seller Ding dingstore 11. Iwant to call your attention to point 4.

    1. I will be on a sailboat and can not be on the net in the coming 10 days
    2.You asked me to send a false card to a chinese address that can not be read by me.
    3.You know this seller is removed from Ebay because the cards he sold are bogus.
    4. The honorable thing to do for Ebay would be to contact all buyers from these card and reimburse them and otherwise Ebay and Pay pall could be in for a class action suit
    since you are now a part of the problem and you know about this problem already for a long time
    5.If you want the proof from a 3th party the cost of that should be carried by you. In the past you got that judgement already.
    6.To require your costumers to send this by traceable mail you make it so expensive for a item under $20.00 that your save buying guarantee becomes a joke.
    7.This system takes so much time and effort that if I would get 3 times the money back I still work for peanuts
    8.I hope I am as specific as possible


  41. conrad said

    Purchased a Transcend 32GB SDHC card which is a fake. The picture they use in the ebay listing is from Transcend USA so it’s the actual picture. I got a memory error in my camera, then I looked closer at the card. The printing on the label is not professional quality. The vendor on ebay is powerstar 88, who suprisingly is a powerseller with 2232 transactions and a 99% feedback rating.

    I contacted Transcend USA and they told me about the color transitions at the top of the card (should be smoooth – mine’s not) then asked for the serial number on the back of the card….the card I received has no serial number. I don’t have a separate SDHC reader so I can’t run the test and report them.

    I after reading this site I filed a dispute. First Paypal service layer told me to work with seller and ship item back, but this is contrary to Paypal’s own policy so I got transferred to someone who was able to escalate it to a claim without waiting the three days you have to wait on the net, but they said they have to wait 10 days for a response from the seller. OK, then they asked if I reported it to Ebay, which I had not, so they transferred me to Ebay. There the guy told me not to worry he was going to credit my account the next day and not worry about the Paypal crap. I guess they’re aware of the issue now, but they haven’t taken any steps yet. They could easily ban flash card listings from China/Hong Kong like they do for Louis Vuitton bags, but they don’t yet. I guess the money they make in fees outweighs the complaints and refunds. I won’t be ordering any more stuff from Hong Kong.

  42. […] Ainda sobre o H2testw: H2testw 1.4 – Gold Standard In Detecting USB Counterfeit Drives […]

  43. […] to test any item purchased from these sellers immediately to determine true capacity using: H2testw 1.4 – Gold Standard In Detecting USB Counterfeit Drives. They are also asking that victims Report in to SOSFakeFlash if they did not receive the advertised […]

  44. jason cairns said

    so I tested a Transcend SDHC 16GB SanDisk class 6 and the write speed was only 3.7 MByte/s I was wondering if my computer could be why the write speed was so slow as it was guaranteed to be at least 6 MByte/s OR did I get a fake sandisk from Amazon?

    Computer is dual processor 1.83Ghz 2 GB RAM

  45. The_Flash said

    Jason, did you purchase the card from Amazon themselves, or did you purchase it from a third-party seller who was selling the product via Amazon’s website?

    Have you tested it with the program H2testw? What were the results?

    Do bear in mind that whilst Class 6 guarantees at least 6MB/sec, there can be overheads from various sources that may cause it to fluctuate a little, and sometimes drop below that speed – as far as I know, this is normal. 😉

  46. pedro said

    Hello sufferers, I ordered 2 SDHC-8Gb cards for my new Panasonic Lumix FZ28 camera and none were accepted, “Memory Card Parameter Error”. I’ve returned. I show the test result of a card that has lasted 12 hours.

    The media is likely to be defective.
    3.9 GByte OK (8292288 sectors)
    → 11.6 GByte DATA LOST (24457280 sectors)
    Details: 0 KByte overwritten (0 sectors)
    0 KByte slightly changed (< 8 bit/sector, 0 sectors)
    → 11.6 GByte corrupted (24457280 sectors)
    0 KByte aliased memory (0 sectors)
    First error at offset: 0x0000000000000000
    Expected: 0x0000000000000000
    Found: 0xffffffffffffffff
    H2testw version 1.3
    Writing speed: 641 KByte/s
    Reading speed: 820 KByte/s
    H2testw v1.4

    The cheap is expensive in the long run.
    Good luck

  47. […] fake is just too high at the moment. Any card size above 2GB is to considered suspect. It should be tested for genuine capacity verses advertised capacity prior to being used to take […]

  48. KittyFireFlash said

    Victims of fake flash purchases have a serious debt of gratitute to Harald Bögeholz. He wrote this program and owns it’s copyright.

    Harald along with c’t Magazin für Computertechnik and offer it free to all in need. It is probably one of the most significant contributions made to help fight against fake flash usb devices.

    Im Namen aller Opfer, wir danken Ihnen!

  49. Roger said

    I was using a 32 gb SD card in my video camera. Most videos were corrupted in some parts and I was afraid the my camera had to be fixed but after using this tool I found out the SD card is fake. Waste of money. 😦

  50. derrick b said

    Warning: Only 14253 of 15392 MByte tested.
    The media is likely to be defective.
    782.5 MByte OK (1602736 sectors)
    13.1 GByte DATA LOST (27587408 sectors)
    Details:13.0 GByte overwritten (27371881 sectors)
    0 KByte slightly changed (< 8 bit/sector, 0 sectors)
    105.2 MByte corrupted (215527 sectors)
    63.5 KByte aliased memory (127 sectors)
    First error at offset: 0x0000000030e5d000
    Expected: 0x0000000030e5d000
    Found: 0x0000000030e4d000
    H2testw version 1.3
    Writing speed: 4.71 MByte/s
    Reading speed: 15.8 MByte/s
    H2testw v1.4

    heres my test, just sent the site a really nasty email lets see what reply i get!!!!

    the company is INTERTRADE CONNECTION

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