You must add the correct retail disc key for The Legend of Zelda: Breath of the Wild to this file.
While a WUX file is great for simply playing the game, modders need to go deeper. Inside every BotW game dump, whether it's a WUX or an RPX folder, lies the game's content in a specific structure. The three most important components are:
At its core, a WUX file is a specially compressed version of a . A raw, uncompressed disc dump (a WUD file) of a dual-layer Wii U game like Breath of the Wild is massive—typically around 20 GB . The WUX format uses a compression algorithm to drastically reduce this file size, shrinking it down to a much more manageable 2 to 3 GB .
| Issue | Likely Cause | Solution | | :--- | :--- | :--- | | | Missing or incorrect keys in keys.txt . | Ensure you have the correct Wii U Common Key and the game's title key properly formatted in your keys.txt file. | | JWUDTool fails to decompress/extract | Incorrect or missing decryption keys. | Make sure to place your common.key in the same directory as the JWUDTool.jar file or provide it via the -commonkey command. | | Game crashes or has graphical errors | Outdated Cemu version or wrong game update. | BotW v1.5.0 is recommended for full compatibility, especially with mods and graphic packs like FPS++. Make sure you have installed the latest game updates. | | Mods not working after installation | Improper mod installation or file mismatch (Wii U vs. Switch mod). | Always ensure your mod is intended for the Wii U version of BotW. Also, use a mod manager like UKMM to correctly merge and load the files. | | "WUX" file not recognized by other tools | Tool does not support the compressed WUX format. | Many older tools expect the larger .wud format. You may need to decompress your .wux file back to .wud using JWUDTool ( -decompress ) before using them. | botw wux file
The raw, uncompressed 25 GB disc image. It contains 100% of the disc data, including empty space. It works perfectly in Cemu but wastes enormous amounts of storage.
There are a few different ways to run Wii U games, and understanding them is key to knowing why you would use a WUX file.
Consists of thousands of tiny files instead of one single file, making it slightly messy to move between folders. How to Convert and Use a BOTW WUX File You must add the correct retail disc key
Because the folder format is superior for updates, DLC, and modding, most players choose to unpack their WUX file. You can easily do this using a free community tool called or JWUDTool . Prerequisites: Your BOTW WUX file. The Wii U Common Key and the BOTW Disc Key. A tool like JWUDTool (a Java-based command-line tool). Step-by-Step Conversion: Download and extract JWUDTool . Place your BOTW WUX file into the same folder as the tool. Open a command prompt (CMD) in that directory.
To install the latest BOTW updates and DLCs in Cemu, using an extracted folder structure is much more reliable and prevents file path conflicts.
While Cemu can run WUX files, keeping your game in this format comes with major disadvantages: The three most important components are: At its
I can provide the exact Cemu configuration settings for your specific hardware.
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