what kind of discs are wii u games
Nintendo optical discs The Wii U Optical Disc (WUP-006) is the physical game medium for the Wii U, with a capacity of 25Â GB. The Wii U system is backward compatible with Wii Optical Discs, but not backward compatible with Nintendo GameCube game discs.[12] The optical discs used for the Wii U differ in appearance from most other optical discs in that they have soft, rounded edges.[13]