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Windows 7 USB/DVD Download Tool error: We were unable to copy your files. Please check your USB device and the selected ISO file and try again.

Sometimes if your USB stick has something in its MBR you might get the error

Windows 7 USB/DVD Download Tool error: We were unable to copy your   files. Please check your USB device and the selected ISO file and try again.

You have to start command prompt as an Administrator (On Windows 7 that means right clicking the cmd and selecting Run as Administrator) and use the diskpart utility.

WARNING: Be careful to select the right drive or else your day won’t have a happy end because if you select the wrong drive you will lose all your data on this drive!

Instead of formatting the partition with FAT32, you can also use NTFS, but then you need an extra step to make the drive bootable:

Bootsect.exe /nt60 X:

“X:” is the drive letter of your USB stick. Bootsect.exe can be found on the Windows 7 DVD in the boot folder. However, I can’t really recommend using NTFS. Some USB stick, at least, appeared to be slower with NTFS.

Complete Steps:

  1. Start command prompt as Administrator
  2. type diskpart
  3. type list disk
  4. type select disk  and number of your USB disk ( like select disk 1 )
  5. type clean
  6. type create partition primary
  7. type select partition 1
  8. type active
  9. type format quick fs=fat32
  10. type assign
  11. type exit to exit the diskpart utility
  12. type exit to close command prompt

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