Wii U can play games from SD cards providing you have a USB card reader
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Wii U users have found a workaround for enabling the console to play games from an SD card - all it needs is a USB card reader. Users can insert their SD card into the reader, and plug it into Wii U's USB port, which treats it as a standard USB thumb drive. No word on how well the games play when using the workaround, but at least it's doable. Thanks, Nintendo Life.