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.
It could work depending on what brand/model you use. He's saying they'll put a list of what works and what doesn't. Basically it's the same with homebrew on the wii, not every usb-powered hdd or flash-drive works.