Windows 8 and 8.1 Forums


8GB USB flash drive not eligible as installer boot media?

  1. #1

    8GB USB flash drive not eligible as installer boot media?


    For some reason, Windows 8.1. downloader package refuses to see my 8GB SanDisk flash drive as a target for creating bootable Windows 8.1 installer USB media. A 16GB Patriot drive is detected and processed properly, but 8GB SanDisk is ignored. The same is true for the Windows 7 USB/DVD tool.

    What could be causing this?

    When I create the media on the 16GB drive, only 3+GB is used, which means that 8GB drive should be sufficiently large.

    UPDATE: It appears that the SanDisk drive is not detected as "removable", so neither Windows 8 downloader nor Windows 7 USB/DVD tool see it as a valid target. There are quite a few reports of that issue on the Net. So, how do I create a bootable Windows 8.1 install media from that SanDisk drive?

      My System SpecsSystem Spec

  2. #2


    Use Diskpart
    Clean
    format fat32

    I had a few SanDisk thumb drives that would not work as install drives no mater what I did. I did a little searching and found out there were some issues with older thumb drives and UEFI, I sent them back to Amazon and got newer units for about the same price and have had no problems with these
      My System SpecsSystem Spec

  3. #3


    Sydney, Nova Scotia, Canada
    Posts : 6,490
    Windows 10 Education 64 Bit


    Quote Originally Posted by AndreyT View Post
    For some reason, Windows 8.1. downloader package refuses to see my 8GB SanDisk flash drive as a target for creating bootable Windows 8.1 installer USB media. A 16GB Patriot drive is detected and processed properly, but 8GB SanDisk is ignored. The same is true for the Windows 7 USB/DVD tool.

    What could be causing this?

    When I create the media on the 16GB drive, only 3+GB is used, which means that 8GB drive should be sufficiently large.

    UPDATE: It appears that the SanDisk drive is not detected as "removable", so neither Windows 8 downloader nor Windows 7 USB/DVD tool see it as a valid target. There are quite a few reports of that issue on the Net. So, how do I create a bootable Windows 8.1 install media from that SanDisk drive?
    I had the same problem with a couple of Sandisk thumb drives I just bought. They don't show up as removable so the Windows 7 DVD download toll wouldn't use them. I used diskpart to make my bootable thumb drive. Option two in this tutorial. UEFI Bootable USB Flash Drive - Create in Windows
      My System SpecsSystem Spec

  4. #4


    Posts : 5,592
    ME, XP,Vista,Win7,Win8,Win8.1


    Quote Originally Posted by Clintlgm View Post
    Use Diskpart
    Clean
    format fat32


    I had a few SanDisk thumb drives that would not work as install drives no mater what I did. I did a little searching and found out there were some issues with older thumb drives and UEFI, I sent them back to Amazon and got newer units for about the same price and have had no problems with these
    Also in diskpart, mark the drive ACTIVE.
      My System SpecsSystem Spec

  5. #5


    Sunnyvale, CA USA
    Posts : 283
    Windows 8.1 Pro with Media Center (64-bit)


    Could these be U3 drives? Normally flash drives are not partitioned and removable.
    But drives with multiple partitions (U3 for example) are not removable.
    You can search for U3 removal tools, or probably diskpart will clean it up.
    Just make sure you clean all partitions.
      My System SpecsSystem Spec

  6. #6


    Sydney, Nova Scotia, Canada
    Posts : 6,490
    Windows 10 Education 64 Bit


    Its something SanDisk did on purpose. I've wiped the drive and reformatted it and it still shows up that way. Why they did it I have no idea.
      My System SpecsSystem Spec

  7. #7


    Thanks for the replies. So, diskpart can be used for that purpose.

    Before I read about the diskpart-based workaround I used Zotac WinUSB Maker utility to "burn" the ISO directly to USB. It also worked perfectly.
      My System SpecsSystem Spec

8GB USB flash drive not eligible as installer boot media?
Related Threads
Gateway won't boot from CD-drive or flash drive in User Accounts and Family Safety
I forgot my password to login to Windows. I always use the number keypad password when logging on, but now the only option is the password, which I forgot. IMy Gateway won't boot from the CDdrive or a flassh drive. I have changed the boot order in BIOS, but it goes from the hard drive anyway. My...
I would like to store all of my cd music on a flash drive and then freecycle the cds. My cds are taking up entirely too much room. However, after following the steps on how to use Windows Media Player to rip cds to mp3 format, I received an "error" each time I tried. Is there a way to either rip...
Cannot boot from Flash Drive in General Support
I got this new Asus Transformer which is a Windows 8.1 system. I made a few images with Macrium Reflect and created an UEFI recovery Flash Drive (with Macrium) for the Macrium recovery program. I can set the BIOS to boot from the stick (in the temporary or permanent BIOS settings). Problem is,...
Pls,Im using Hp Pavillion g6 laptop,& i want to disable booting from external media in the Bios set-up,how do i do it?.Looking forward to your response.Thanks.
I am running Windows 8 on an HP laptop. I have downloaded flash 11 and Firefox 18. When I try to run either the flash installer or the FF setup file from the download folder on my computer, nothing happens The files will not open. I disabled my virus software in case that was causing a conflict...
Hello Windows 8 members. I'm Trinty from Windows 7 forums (maybe someone knows me). I installed Windows 8 on VM but I want to install it on my current machine, dual-boot with Windows 7. Windows 7 is already installed and there is one problem. I don't have Install CD and Repair CD. My...
Eight Forums Android App Eight Forums IOS App Follow us on Facebook