How to Put Wii Games on an SD Card From PCby Nicholas Wyatt
Copying Wii games to an SD card frees space on your computer hard drive and allows you to play the Wii games from your Wii on a backup loader that can use the SD card. You can prepare the SD card and copy the Wii game in a short amount of time.
Insert an SD card in your computer and go to "My Computer." Right-click on the SD card and choose "Format." Choose "Format as FAT32." Your Nintendo Wii can now read your SD card with your Wii ISO on it from your preferred Wii SD backup loader if you would like to load the Wii ISO on your Wii to play.
Go to the directory where you have your Wii game saved. Right-click on the Wii game and select "Copy."
Go to "My Computer" and click on your SD card to open.
Create a folder named "Games." Inside the Games folder, right-click and choose "Paste" to copy the Wii game to your SD card.