Well, would it work to have USBLoader GX run from the SD or USB stick (whichever one), and load the backups from the HDD? Or would I need to have USBLoader GX run from the HDD, but other homebrew run from the SD/USB stick?
EDIT: Is the Wii U and its homebrew all compatible with 3.0, Motion+ controllers (and the Wii U pad of course), etc?