The process seems a little cumbersome. You'll first need to insert an SD card with at least 512 MB of RAM into your Wii U, and ready it using a transfer application.

The all in one media kit - transfer your movies, music, images and cheats between your PC and Wii® console using the supplied 1GB SD card, reader and media software. Doncaster, UK – 19th August ...

After complaints from users about the lack of onboard storage, Nintendo announced today it will offer an online upgrade to allow games to be downloaded to an SD card to boost capacity.