I have a Corsair Flash Voyager GT with capacity of 16 GB bought roughly 5 years ago. It was working okay on all my computers, like a flash drive usually does. One day I lend it to my friend and when he brought it back, he told me he could not get it working. After that I could not get it working on any of my Windows systems too.


  • The LED on flash drive doesn't blink;
  • The device is not present in Computer Management / Storage;
  • The device shows up under Other Devices / Unknown Device and Universal Serial Bus Controllers / Unknows Device in Device Manager;
  • Windows 7 also fails to find and install drivers for Unknown Device.

However, under Ubuntu 10.04 on my netbook, the flash drive is fully operational: I could easily back up data from it, format it (however formatting did not help to get it running on Windows). FYI the filesystem was NTFS, reformatted as FAT, so that's hardly the issue.

In addition, I tried to plug this flash drive into freshly installed Windows 7 x64 Ultimate. I read that it might be a driver problem. Unfortunately this was not of any help.

What can be cause of this? Given that the device is working okay in Ubuntu, I assume that the hardware itself is not damaged. And is there any way to fix it? If yes then how?

  • Try GParted in Linux to delete all existing partitions on the drive (not just reformat) and then try it under Windows. Hopefully you'll get an option to initialize and format it, and then it should work. – Karan Apr 1 '13 at 9:56
  • @Karan played around with GParted, unfortunately it did not help. Pendrive is still "USB device not recognized". – Actine May 2 '13 at 12:50
  • Did you delete all partitions and then insert the completely unpartitioned/uninitialised/unformatted drive into the Windows PC? If the drive's still unpartitioned, try inserting it after running USB Oblivion on your Win PC (be sure to check the "Do real clean" checkbox). – Karan May 2 '13 at 14:46
  • Same problem - got two USB Mass Storage devices, both work on an Ubuntu laptop but Windows 7 sees them as Unknown Devices. USB Sticks that do not require too much power to work are registered by Windows 7 (and Ubuntu) fine. So I think atm it's a Windows 7 driver issue. – Spedge Dec 23 '16 at 14:02
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    run file /dev/sdb or fdisk /dev/sdb with sdb is your USB to see the actual disk format – phuclv May 1 '18 at 10:44

Happened the same to me. Try using gparted then wipe the flash drive without any filesystem. I then plugged in Windows and it worked and prompted to format to FAT32. I think that happened because I used the flash drive to boot a linux installation before.

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