Things You'll Need
Instructions
Insert your SD card into your GameCube memory card adapter
Insert your memory card adapter into one of the memory card slots on your GameCube. These slots are rectangular and located above your GameCube controller ports.
Turn your GameCube on and begin playing a game. When you are ready, save the game in accordance with the saving procedures for your game.
Select the memory card slot with your adapter when saving your game. The file will save to the SD card in your adapter.