Originally Posted by Pineconn
It looks like you have to use an external hard drive with a separate power source. I can't understand Japanese, so I'm going by the big red exclamation point that appeared when the hard drive was connected to the Wii U without separate power, lol.
Same with jump drives. Probably won't work.
I have no idea.
Looks you can use them but these usb powered hard drives need to use Y cables for extra power.