i've seen some conflicting instructions on this. so if my ext hdd is a virgin, meaning that it's right out of the box, never been used, never been formatted... literally right out of the box. do i need to hook it up to pc first then format it to fat? or can i just hook it up to wii, run the usb loader then format wbfs(?) and can i put a back up dvd to my pc's dvd rom, extract the iso, then put it on the ext hdd using some kind of program?