I connected a powered HDD of 100gb to the USB port of the WiiU. After the message that the Disc would be formatted for WiiU only, I can transfer files to it.
I tried all small games were no problem. But when sending the larger games from my WiiU HDD to the external I only get error messages. I just can't copy them to the external disc. Also, yesterday I downloaded Lego Marvel (6gb). It placed the game on the external HDD but doesn't play the opening scene. After sending it back to my WiiU HDD it just worked fine.
What could be the problem with the Extrenal HDD? Should I buy another one? Or did I have to format it on my mac before connecting it to my WiiU?
Any help would be welcome