If I call correctly, there is a cap to how many Wii U games you can have at a time

The 3DS had a cap of 300 downloadable games (i think) so the Wii U probably has one too

Can you post a screenshot of the error message? I have a 4TB dual external enclosure on mine (I know, I know way overkilled) and have 150+ digital games and not run into this issue.  On the home screen I just get more pages as I add more games.

From what I recall, Wii U regardless of its storage capacity, you can only accumulate a maximum of Wii U 300 "channels". Do you actually have 300? From what I understand, this includes useless channels or icons like demos, etc.

Delete an icon with the smallest size, with the least amount of play and you should be good.

Edit: Just a guess, btw.

Also, create a folder. I believe Wii Menu can hold up to 60 folders with I believe can hold 300 within it. Folder count as one. Do you actually have 300 items on your menu? No folder?

Am I understanding this correctly? Either way, hope this helps. I don't think nobody, even Nintendo, for anybody to run into this problem probably.

Wow are you a multi millionaire Spurge? you must be to afford all those games. I though I was overkill with 70 Wii U games.

The Wii U launched approximately 200 weeks ago so you should definately have 300 games by now.

http://nintendoenthusiast.com/news/the-wii-u-has-a-limit-for-digital-games-installed-smaller-than-3ds/
The limit is 300 according to others that has run into this problem - Strange!