How To Check and Test USB Flash Drive

25 Responses to “How To Check and Test USB Flash Drive”

• borrel March 16, 2011 at 2:45 am

  @Raymond

  if you cannot find a drive you should try to start the program whith the /all option

  or use danger.bat

  ony it have a bug(edit with notepad)
  —8<–
  @start ChkFlsh.exe /All %1 %2 %3 %4 55 %6 %7 %8 %9
  —8<–
  must be
  —8<–
  @start ChkFlsh.exe /All %1 %2 %3 %4 %5 %6 %7 %8 %9
  —8<–
  WATCH OUT THIS CAN (AND WILL) DESTROY WINDOWS
  (sorry shift ) #############

  and b.t.w.
• MSD November 8, 2010 at 8:17 pm

  i need this tools
  thks
• Craig June 19, 2010 at 9:21 am

  Hello,

  nino7050 (17) recommends a program called Check Drive Capacity but I have been unable to find this anywhere.

  Does anyone have a link?

  Thanks
• mehdi June 7, 2010 at 10:40 pm

  thank u very nice
• si May 22, 2010 at 4:59 am

  RMPrepUSB can do a quick test of USB drives. It only reads/writes blocks at intervals and it is designed to quickly test flash drives for missing memory – e.g. you buy a 32GB USB drive and it turns out to be 4GB – but you have to wait 8 hours for H2testw to test it – RMPrepUSB takes 10 minutes (but does not test every block – use another test for that once it passes RMPrepUSB).
  RMPrepUSb is mainly used for partitioning, formatting and making bootable USB drives. See boot-land.net or YouTube for more info.
• jcl May 15, 2010 at 3:00 pm

  I would like to know how can I retrieve my files in my flash drive because I couldn’t browse my files or I couldn’t even view it. Could you please help me. Thank you.
• ramadhan March 13, 2010 at 9:51 pm

  kk minta kash tw cara na menubah size flashdik dari 2 GB menjadi 4GB
  PLEAZE COMMENT NA…..
• Jurga December 22, 2009 at 9:40 pm

  Help my what to do if the USB When you save files and keys removed and switched on, the files will already have damaged or to move from one directory to another? Is that a USB can I fix it?
• nino7050 November 1, 2009 at 6:22 pm

  Gracias Raymond
  por compartirlo con los demas mira a ver si te gusta esta otra ramienta se llama Check Drive Capacity
• Andy June 5, 2009 at 7:56 am

  Used the above program CHKFLSH and it killed my mp4 player. it was working before i used it, to test the memory.
• Egghead April 18, 2008 at 1:53 pm

  Thanks, it works.
• Brian April 13, 2008 at 10:10 am

  May I know why is my USB flash drive is running so slowly?
• Kn10 March 26, 2008 at 5:43 pm

  Thanks Raymond. You rock.
• Raymond March 26, 2008 at 2:06 pm

  Added a download mirror.
• Kn10 March 26, 2008 at 1:34 pm

  Raymond, could you (or one of the readers) please upload a mirror of this tool? The original site hasnt come back up yet.
• aslikhar March 24, 2008 at 7:56 pm

  my new pen drive kingston 8gig not recognized by my pc(vista os) why?
• Terence Hill March 22, 2008 at 1:28 am

  Nice tool Raymond.

  Nice to know also the Timo Bell system: the command fsutil has some useful options.

  Clarification: fsutil file createnew X:\dummy.dmp Y
  Y is the size of dummy.dmp in Bytes, not in KiloBytes
• Timo Beil March 22, 2008 at 12:36 am

  There\’s more easy way to do that using the same OS API calls that will be used by any file manager tool should you happen to be needing to copy/write something on your USB drive. To do that you have to the following.
  1. Select Start+R type cmd to start command prompt
  2. In the command prompt window type
  fsutil file createnew X:\\dummy.dmp Y
  where X is the drive letter for your USB stick,
  Y is the number of kilobytes you want to write to your dummy.dmp file. Like if you want the file to be of 1 megabyte size type 1048576 instead of Y here (1 Mbyte=1024*1024=1048576 bytes)
  If utility will fail to write this file, it may indicate you have problems with addressing or microchip on your USB drive.
• webcadre March 22, 2008 at 12:33 am

  interesting tool,

  by the way ray what did happend to the usb that you test?

  did you buy it?

  yeah link is dead…

  thanks!
• dave March 21, 2008 at 7:33 pm

  As others have already said the link to CheckFlash is down so I read with interest the program used by reader Freekmans.
  I have downloaded and tried out his suggested alternative program and found it to be a very useful tool. Thank you Freekmans.
• Freekmans March 21, 2008 at 6:41 pm

  Hi Raymond !

  I personally use \”h2testw\” to test if I bought a USB Flash disk (or SD card etc) with hacked memory (from eBay).
  I\’m sure you know what hacked memory is: It\’s faking/hacking the USB Flash disk to show more capacity than it really can hold. E.g. a flash disk with a 2GB chip and hack it to 4Gb. But ofcourse after 2GB you get errors and currupted files because the real chip is full.

  H2testw also shows the read and writing speeds and when the usb disk is defective, it also shows which sectors and form how many GB\’s it\’s defective, so that you can resize it to the original size.

  Download (Freeware):
  heise.de/ct/Redaktion/bo/downloads/h2testw_1.4.zip

  Let me know if this is what you meant !
• Raymond March 21, 2008 at 6:29 pm

  I think many people are hitting on the download link and the official website is down. Please try again later. I think next time I should provide a mirror link.
• steve March 21, 2008 at 5:54 pm

  yea the link is dead ;_;
  Love the site though :D
  I wait almost every day at my computer for your emails to come!
• Alan March 21, 2008 at 5:10 pm

  Hi Raymond

  First time for everything, but this link to Checkflash is not working. Do you have another link please?
  Love your site and the amzing work you do!

  Many thanks

  Alan
• dipin March 21, 2008 at 4:39 pm

  thanx ray. nice tool.