Get an SD card.
Super Mario Boards
Movie Bowser
Gloriosa Daisy
You can do that?
YoshiFlutterJump
You can't (without homebrew, that is). SD cards can only hold Wii channels and Wii save data.
I use a flash drive on Wii U but I also lost all my save data once because of it...I know you're probably not willing to use homebrew but that's what I recommend.
I use a flash drive on Wii U but I also lost all my save data once because of it...I know you're probably not willing to use homebrew but that's what I recommend.