Instructions
Insert your SD card into the card slot on the front of the console.
Turn your Wii on. Select the Wii icon on the bottom left corner of the screen to open the "Wii Settings" menu.
Select the "Data Management" option, then select the "Save Data" option, and choose the "Wii" option to move to the Wii's memory menu.
Select the "SD Card" option to open a list of the files on your SD Card.
Select the file you wish to copy, select the "Copy" option, then select "Yes" to transfer the file to your Wii's hard drive.