Help: How do I transfer/copy MK8 data from one NNID to a different one in my Wii U?

[t3mporary_126]

ikki5 said:
doesn't the data save on the Wii U itself? Can't you just insert a USB device and put the data on and move it? I'm not 100% sure as I have never done this but it would make sense.

I read online that it doesn't so I didn't try lol. But I'll try it now since I got time.