I have a 256GB sd card for the vwii, but I think it might be too large. it takes quite a bit of time to move games from internal memory to the sd card. then, they fail to launch. the card works with injecting wads to emunand, just not in the home menu. games work from internal flash but not from the sd card. edit: looks like nintendo recommends 32GB or lower. the card works with everything vwii or wii u side except for playing games directly from. well, nintendont can play cube games from the sd card, so I think it's a limitation imposed on the vwii. edit 2: or maybe it's because I have 2 partitions on the card: one for the system; another for redNAND. I extracted the redNAND, but I kept the partition just in case I wanted to mess with the system at no risk.