Unlike standard ISO files or the compressed WUD/WUX formats used for emulation (like Cemu ), a WUP is not a single file. Instead, it is a folder containing specific encrypted components: : The core data blocks of the game.
If you own a physical Wii U running custom firmware (such as Tiramisu or Aroma), WUP files are highly efficient. wii u wup roms 2021
: You'll need to obtain Wii U game ROMs. This is the most legally fraught aspect. If you own the physical copy of a game, there are legal ways to create a digital backup for personal use, but this can depend on your country's laws. Unlike standard ISO files or the compressed WUD/WUX