The Nintendo GameCube console features its own memory card port and does not accept SD cards, but the Wii gaming console accepts SD cards and emulates a GameCube system. The SD card can be used to save, transfer and store game files for both Wii and GameCube games on the console. Even more can be done with the SD card if you have an SD card reader on your computer.
Insert the SD card to the Wii. The SD card is located on the front of the Wii to the left of the disc loader. Lift open the little white flap. Insert the SD card with the label facing to the left and push it in until it clicks.
Power on the Nintendo Wii. In most cases, if the Wii already is on, the SD card will still load, but if not, just restart the Wii console and the card should load without any problems.
Point the Wii remote to the SD card channel on the bottom of the screen. Press the "A" button to select the channel. The channel should appear blank. Click on the Wii console icon to load all of the data that is stored on the Wii.
Click on a saved game file that you want to transfer to the SD card. Click on the "Move" or "Copy" option. If you move the file, it no longer will be stored on the Wii, but if you copy the file, the backup will remain on the Wii and the SD card.
Choose to "Transfer to SD card." Wait for the progress bar to fill up and transfer the files. Reverse this process by selecting a file on the SD card and choosing from the same options.
Insert the SD card to your computer. Download saved game data from popular Wii games. There are several sites that offer saved game data.
Remove the SD card from the computer and insert it to your Wii.
Insert the game disc for the saved game file.
Load the game and from the menu select the "Load Saved Game" option.
Choose the SD card port and find the saved game file. Give the game a minute to load and the saved game will appear.
While transferring files to the SD card, do not cut power off to the Wii or you could lose the data that was transferring and all of the data on the SD card.