I have a question about the hard drives as well. I know the guide says you must use an externally powered HDD, but I don't have one. So for the heck of it I tried the HDD I used in my Wii, and it seems to work fine. However, so far I've played two separate games off of it (one GameCube via Devolution, and one Wii game), and both times after 10-15 minutes of play, the console would stop reading input, but would act like I was still pressing whatever buttons I was pressing when it happened. I hope that makes sense. Anyway, I can't do anything at that point except disconnect the Wii U from power, as nothing provokes any response from the Wii U.
My question is a two-parter:
1. Is this expected behavior of a non-externally powered HDD (as opposed to it not being recognized at all)?
2. If not, help pl0x. I guess to make this one a question, I'll reword it: how can I fix it? Thanks!
EDIT: I use USB Loader GX, the version that is currently linked in the Devolution guide. Not sure if that matters, but I figure the more information I can supply the better. Also, I just modded the vWii today, so all the cIOS and Homebrew Channel should be up to date. Also again, I have been using the Aspect Ratio fix as well.