This mod adds an on-brand menu to the GameCube where you can play ROMs off of an SD card. The coolest part is that it piggybacks off of the disc drive instead of replacing it! And no soldering! I’m a big fan of passionate retromod projects like this.
Sounds better than my current setup. I have Swiss on a SD card plugged in with a memory card adapter, my roms on a micro SD card in the serial port using an SD2SP2. To boot into Swiss I have to use an Action Replay disc. It works but it’s a pain.
If you have a Wii hacking it is super easy and allows you to play GameCube and Wii ISOs.