I'm pretty sure that if you're doing a SD dump from your wii, you need an adapter that fits into the GC memory card slot. It's a way to get an ISO of the game without ripping it on the computer. If you ask me, it's probablly safer to rip it to your computer first, you don't know what kind of update it has that may brick the wii [never ripped via SD, so I'm not sure if that's an issue]