if it's not 100% full HDD Raw Copy might be able to create a compressed image...
Ok i will try that.
Last edited by Cava,
if it's not 100% full HDD Raw Copy might be able to create a compressed image...

Unfortunately, I was wrong. The first 4 bytes of the USB seed are always the console's ID, which can not safely be changed so the program Dimok released an hour ago isn't useful for your needs.
However, should you format your Wii U for any reason, then the program is usable for keeping your USB drive compatible with the system.