Windows 8 and 8.1 Forums


How to make an ISO of a bootable USB flash drive?

  1. #1


    Posts : 241
    Windows 8.1x64 Pro

    How to make an ISO of a bootable USB flash drive?


    Hi all, I'd like to make an ISO image of a bootable USB flash drive so I can later use it to burn to another USB flash drive that would act as a clone of the 1st one. I tried PowerISO and UltraISO without success. Any ideas? Thanks

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  2. #2


    Austin TX metro area
    Posts : 640
    Windows 7 Pro 64bit [MS blue-disk set]


    I think one good safe way to duplicate USB sticks are to "clone" them; however, let's see what others may say.
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  3. #3


    Posts : 241
    Windows 8.1x64 Pro


    So how do you clone them?
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  4. #4


    Austin TX metro area
    Posts : 640
    Windows 7 Pro 64bit [MS blue-disk set]


    Macrium Reflect probably can clone USB stick A onto USB stick B; I use Acronis True Image myself, and it can clone from A to B.
    Addendum: Later poster is correct -- ATIH cannot/will not clone to USB sticks.
    Last edited by RolandJS; 22 May 2015 at 08:40.
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  5. #5


    Posts : 241
    Windows 8.1x64 Pro


    Yes, I use Acronis True Image too, but I always thought it can only clone hard drives and SSD's, not USB flash drives. Will give it a try.
    UPDATE: I can confirm that Acronis True Image 2015 cannot clone USB flash drives, only SSD's and HD'.s.
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  6. #6


    How about something like this: Download ImageUSB - MajorGeeks
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  7. #7


    Posts : 2,690
    Windows 3.1 > Windows 10


    I assume you have windows 8.1 and you need certain files in your windows\system32 folder that are not present on your current system..

    oscdimg is a MS tool for creating ISO's > https://technet.microsoft.com/en-us/.../hh824847.aspx

    And the Command Line is >
    Oscdimg -bootdata:2#p0,e,bEtfsboot.com#pEF,e,bEfisys.bin -h -m -o -u1 -udfver102 S:\ T:\name.iso

    The last two entires
    S:\ = the source directory and/or folder for the iso files
    T:\Name.iso = the Target directory and file name and iso extension for the New ISO
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  8. #8


    Posts : 101
    Windows 8.1


    What am I missing here?
    Wouldn't it be easier to connect the old USB drive and the new one and copy the drive?
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  9. #9


    Posts : 241
    Windows 8.1x64 Pro


    Quote Originally Posted by KYHI View Post
    I assume you have windows 8.1 and you need certain files in your windows\system32 folder that are not present on your current system..

    oscdimg is a MS tool for creating ISO's > https://technet.microsoft.com/en-us/.../hh824847.aspx

    And the Command Line is >
    Oscdimg -bootdata:2#p0,e,bEtfsboot.com#pEF,e,bEfisys.bin -h -m -o -u1 -udfver102 S:\ T:\name.iso

    The last two entires
    S:\ = the source directory and/or folder for the iso files
    T:\Name.iso = the Target directory and file name and iso extension for the New ISO
    Thanks KYH, I'll test it!

    Quote Originally Posted by CountMike View Post
    How about something like this: Download ImageUSB - MajorGeeks
    That looks promising, I'll have to test it, thanks.

    Quote Originally Posted by Koukol View Post
    What am I missing here?
    Wouldn't it be easier to connect the old USB drive and the new one and copy the drive?
    You mean a copy/paste operation? No, that won't do it, you can't copy the boot sector this way, so the new drive will not be bootable.
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  10. #10


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


    I think if you save a sector-by-sector image backup with Acronis it should work. That's how I backup my bootable flash drives and I have restored them successfully.

    You have to be sure that you are saving and restoring the MBR, that's where the ISO boot code resides.

    Also, make sure the flash is exFAT or Fat32, not NTFS.
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