I'm just wonder because right now I just have Gamecube games on a SD card, but I'd like to move them to a HDD and put some harder to find Wii titles on it. Problem is I think that whenever I boot into Wii U mode it will detect an unrecognized HDD and persistently ask to format it, and maybe even refuse to lat me play games. How does everyone else handle multiple HDDs? And can I plug them (and the Gamecube adaptor) into a hub so I don't have to have a monster mess of cables all over the place? thanks.