Instructions
Turn on your Wii console. Click the "Wii Options" icon at the bottom-left on the screen.
Click the "Data Management" icon. Select "Save Data" to manage all your saved games on the Wii's internal memory. Otherwise, select "Channels" to manage any application currently installed.
Press the icon pertaining to the video game or application you wish to manage.
Select "Move" or "Copy" from the subsequent pop-up menu to save the chosen item to an external SD card, if available. Note that the "Copy" function will leave a replica inside the Wii's internal memory. The "Move" function will remove the item from the internal memory and save it to the external storage unit.
Select "Erase" to permanently remove the item from the Wii's internal memory. Allow approximately 5 to 30 seconds for each process to finish, depending on the item's size.