 The Wii console contains 512 megabytes of internal flash memory , and features an SD card slot for external storage . An SD card can be used for uploading photos and backing up saved game data and downloaded Virtual Console and WiiWare games . To use the SD slot for transferring game saves , an update must be installed . Installation may be initiated from the Wii options menu through an Internet connection , or by inserting a game disc containing the update . Virtual Console data cannot be restored to any system except the unit of origin . An SD card can also be used to create customized in @-@ game music from stored MP3 files ( as first shown in Excite Truck ) and music for the slide @-@ show feature of the Photo Channel . Version 1 @.@ 1 of the Photo Channel removed MP3 playback in favor of AAC support . 
