.wua (Wii U Archive) format is a compressed file type specifically designed for the Cemu emulator

  1. Space Saving: WUA files are significantly smaller than WUD files (often 30-50% compression).
  2. One-File Library: Instead of having a folder with code, content, and meta subfolders, you have one clean .wua file.
  3. No Key Management: The archive handles decryption internally.
  4. Metadata Preservation: It retains update and DLC data that would otherwise be separate.

800GB to 1.2TB

A complete Wii U WUA archive for a single region typically ranges from . This includes:

IMPORTANT: Cemu is shifting away from encrypted ROMs (WUX, WUD). It is strongly recommended you use decrypted ROMs (Loadiine, WUA) EmuDeck Wiki

The Archivist’s Defense:

Wii U WUA ROMs archive

For the rest of us, the represents a time capsule. It holds the strange, wonderful, and commercially failed library of Nintendo’s least-loved console—from the brilliant Super Mario 3D World to the baffling Animal Crossing: Amiibo Festival . In a decade, when the last working Wii U disc drive stops spinning, the WUA file on an SSD will be the only way to play these games.

Step 2: Configure Keys

Place your console’s keys.txt in the cemu directory. Without legitimate keys, WUA files will appear as garbled data.