: C:\Users\[YourUsername]\AppData\Roaming\Cemu .

Wii U games are encrypted by Nintendo to prevent unauthorized access and piracy. Cemu, as an emulator, mimics the console's hardware but lacks the built-in decryption hardware found in a physical Wii U. To bypass this, the emulator requires two types of hexadecimal strings: Common Keys: These are universal keys for the Wii U system. Game-Specific Keys (Title Keys): These are unique to every individual game title.

However, an emulator like Cemu is software running on a PC; it doesn’t have the Wii U hardware inside your computer. Therefore, to read an encrypted Wii U game file, Cemu needs a "master key" to unlock the data.

Cemu modernized its file structure. Do place keys.txt directly in the root folder.