Hi Sean,
Most of my channels are NES, Megadrive, PC Engine and SNES games, which take up very little space at all. N64 games, NeoGeo games, and Wii Ware titles are huge in comparison, and if you’ve got things like the Wii Fit and Mario Kart channels active too, you’ll fill up your Wii in no time.

However, since taking the picture I’ve had to delete loads of channels in order to make space for Pop!, Toki Tori, and saved games 🙁