For best results we recommend using a external storage device with its own power supply that connects to the wii u system via the usb port on the console.
External hard drive with power supply for wii u.
Due to the wide range of external storage devices usability and performance will vary.
From the above quote it appears that although the use of a y cable is already good enough you might still encounter a drive requiring more power than even two usb 2 0 ports.
Fortunately the wii u supports external hard drives so even if you ve got the standard with its itty bitty 8gb drive you can add up 2tb of space.
This seagate drive is the closest you ll get to nintendo s exact recommendations and you.
That should see you through the next eshop sale.
In the wii u s case it means you re going to need to purchase a y cable plug the single end into the external and both of the other ends into the two usb ports on the wii u.
At this price you get the biggest hard drive the wii u can still use plus it has an external power supply.