The Wii U would see the USB adapter like a hard drive and format it with the Wii U file system...wait.. i can use a Micro usb card Reader?and instal direcly on the SD Card plugged on the Micro usb card reader? for coincidence i brought one yesterday lol
You couldn't just pop it back into the computer to transfer files
So you'd need a large sd card and another one to store the temporary installation files for the game on