The "[Guide] Devolution - USB Loading GameCube Games On Wii" guide taught me how to load gamecube games from usb hard drive. For some reason when playing games, saving doesn't work. The game I have tried are Metal Gear Solid and Luigi Mansion which are compatible of saving using memcard emulation according to the Compatibility List. The loaders I am using are USB Loader GX and WiiFlow. 4.1U system menu.