I tried to make a bootable USB stick to boot Windows in Ubuntu. I used WoeUSB. How can I use it? I chose From a disk Win10_1909_EnglishInternational_x64.iso and file system FAT and target device /dev/sdb. When I clicked Install, the output was:

Installation failed!
Exit code: 256
Error: Source media is currently mounted, unmount the partition then try again
You may now safely detach the target device

So how can I burn Windows 10 iso file to USB stick?

1 Answer 1


The size of the ISO you want to use is 5,172 MiB.

The maximum possible size for a file on a FAT32 volume is 4 GiB minus 1 byte or 4,294,967,295 (232 − 1) bytes.

It won't fit.

Use NTFS on the USB Flash Drive instead.

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