If Cemu asks for a keys.txt , it means you are using a locked WUD/WUX file. It is generally easier to find/dump games in decrypted (Loadiine/WUA) format to skip this step.
To ensure a smooth gaming experience on Cemu, follow these tips: rom wii u cemu
Legally, the best way to get your games is to "dump" them from your own physical Wii U console. Wii U Hacks Guide: To dump your own games, you typically need to follow the Wii U Hacks Guide to install custom firmware like Tiramisu or Aroma. Disc Rot Warning: If Cemu asks for a keys
Decrypted Loadiine format (folder with code/content/meta ) or WUA (Cemu’s compressed archive) are easiest. WUD/WUX require keys. If Cemu asks for a keys.txt