16 GB Kingston Datatraveler USB thumb drive, only 49 MB Usable


  1. Quadzilla
    Posts : 27
    Windows 7 Proffessional 64-bit
       New #1

    16 GB Kingston Datatraveler USB thumb drive, only 49 MB Usable


    Hello,
    I just started having problems with my 16 GB Kingston Datatraveler USB thumb drive. The drive is around 4 years old and was working fine until yesterday when I transferred some videos to it (from my Windows 7 PC), right clicked the drive in Windows Explorer and clicked eject. I then plugged the drive into my Sony Blu-ray player hoping to play the videos but got an error from the player that the drive was unrecognized. When I plugged the USB drive back into my PC, it recognized it but only as a 49 meg drive. Disk management lists the drive as Disc 7, Removable, 14.46 GB, Online, with 3 partitions which are listed as (L:) 49 MB NTFS, Healthy (primary partition), the 2nd partition as 99 MB, Healthy (EFI system partition) with no drive letter and the 3rd partition as 14.32 GB unallocated. When I right clicked the unallocated space, the only clickable options I see are Properties and Help, all the others are grayed out and can't be clicked. I also changed the Removal Policy a couple of times but that didn't help.

    I attached the same drive to my Windows 7 laptop and was having the same problems. I'm wondering what the problem might be and if there's any way to get this drive working again so I can access the unallocated space? I know thumb drives are inexpensive but I'd still like to be able to use this drive if I can. Thanks for any info you all can provide!
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  3. samuria
    Posts : 3,786
    win 8 32 bit
       New #2

    Post a screenshot from disk Management so we can see
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  4. Quadzilla
    Posts : 27
    Windows 7 Proffessional 64-bit
    Thread Starter
       New #3

    here you go, thanks...
    Attached Thumbnails Attached Thumbnails 16 GB Kingston Datatraveler USB thumb drive, only 49 MB Usable-captureb.jpg  
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  6. samuria
    Posts : 3,786
    win 8 32 bit
       New #4

    If you delete the efi parition can you create then failing that Use diskpart clean to wipe the drive then it should work
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  7. mjf
    Posts : 5,969
    Windows 7x64 Home Premium SP1
       New #5

    I have a couple of these and they are all formatted FAT32 and one partition. If you want it back to this state try
    delete partitions as suggested to get a RAW drive then
    https://kb.sandisk.com/app/answers/d...or-a-usb-drive
    Note: you will lose any data on the flash drive.
    I believe Windows only recognizes the first partition on a flash drive. Linux and Macs will recognize multiple partitions.
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