Scroll a few pages back until you see a red envelope with a bomb shape inside and an SD icon hovering over it. Properly eject the SD card from your computer and place it into the SD slot in your Wii. Once the files have been copied to the SD card, you can delete the LetterBomb folder, it will not be used again in this tutorial. Remember, only copy the contents of the LetterBomb folder, not the actual folder itself. Now, take the contents of the LetterBomb folder and place them in the SD card.
If there is, just rename the folder to 'private_old'. In the root of the SD card, there might be a folder called, 'private'. Now, you need to plug your SD card with at least 4GB into your computer.