I have a 32GB Wii U. I knew I would have to erase some games to fit the almost 16 GB of data for Smash Bros, but after deleting my copies of Pikmin 3 and Windwaker HD games, I only have some NES and Super NES games left, as well as some save data, but it still says I only have 11 GB free. I added up the MB of the files remaining, and it only adds up to a little under 2GB. The Nintendo Support websites say I should have 25 GB free.
I don't have an external USB hard drive (nor can I afford one at the moment).
Does anyone know how I can fix this so I can download Smash Bros on my Wii U console?