Limited usefulness, inexpensive generic cards serve same purpose
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SD memory cards are an optional purchase of limited usefulness for your Nintendo Wii. Use a SD memory card to store photographs and music for the Wii's Photo Channel; and to back-up saved games, downloaded Wii Virtual Console titles, and Wii software (such as the Wii Internet browser).
Downloaded virtual console titles and software can't be run directly from an SD card but only from the Wii's console memory. Nintendo's thought here is that if you don't have any free space in your Wii's console memory for new software or a saved game, offload something onto a SD card. However, one may also delete purchased virtual console titles and software, because these may be re-downloaded free of charge from the Wii Shopping Channel.
Offloaded virtual console titles and Wii software on an SD card may not be used on another Wii console, as they are locked specifically to your Wii Shopping Channel account. SD cards will not store Nintendo GameCube saved games -- you will need to purchase a GameCube memory card for that. Your Mii avatars may not be backed up onto a SD card. Use a Wii Remote Controller to store up to ten Mii characters per controller.
Of note, generic high-speed SD memory cards perform just as well (for example, PQI, Ridata, or Sandisk), and often cost one-third less than a Sandisk/Nintendo branded SD memory card. Given the Nintendo Wii's limited utilization of SD memory cards, generic SD cards are a smarter buy.
