Nintendo Wii U on sale Nov. 18; what you need to know

Nintendo says the Wii U will support hard disk drives up to 2 terabytes in size. The Wii U cannot recognize drives larger than 2TB, but Nintendo says it is working on an update for December that will let the new console interface with larger drives.

The external HDD also needs its own power source; the game maker does not recommend trying to run an external HDD using power from the Wii U's USB 2.0 port. Nintendo also advises against using SSDs and portable flash drives for external storage.

What about SD cards

You can use SD cards to save limited sets of Wii U data such as an image of your Mii avatar or transfer data from a Wii to a Wii U, but Nintendo says you cannot use an SD card to store Wii U game data.

Do I need a specific HDD format