Download Dolphin 5.0-13601 … Select the 'GameCube Saver' application, then select 'Load.' On wii, if you set the memory card emulation to OFF, it will use the real memory card inserted in slot A. It saves everything in the Gamecube's memory to a file, so you can load it later and continue from exactly where you left off. From here, find the Game ID.ini, copy it to a place you will remember, and then delete the one in that folder. The virtual SD card has important use for homebrew apps on Dolphin.
On rare occasions, a Gamecube memory card may become corrupt and seemingly unusable.