I installed PortablizeMii, but 4 out of 5 attempts to power the Wii on, I'll get the "no config file found" screen and the only option is to boot to system menu. On the off chance it does boot properly, selecting a game from the emulator section shows a brief loading screen, 5 seconds of black, then straight back to page 1 of the emulator section. Nintendont also says "No FAT device found" if I try to load into it or any GC game from Postloader. Wii games boot no issues, but loading is super super slow.
These are all signs of a slow/incompatible USB, yes?