How I finally extracted .wud files.
I’ve made a few posts regarding Dolphin, an emulator for Wii and GameCube, but I recently decided to try Cemu Emulator, an emulator for Wii U. It is not as refined as Dolphin, but development has seen some major improvements over the last few weeks. For example their Patreon website has nearly doubled in the $ per month, most likely due to the fact Legend of Zelda Breath of the Wild was released. If you would like to contribute you can click here. Not only are you supporting the developers, but there are some benefits for being donating to Cemu’s Patreon.
What are .wud files?
Being new the Cemu application there are a lot of things to learn. One of the first things I needed to learn was how to extract .wud files. If you don’t know the .wud file is the name of the .iso that Wii U games are found. There are a bunch of tools that are able to extract the .wud file, but for whatever reason no matter what tool I used I constantly ran into errors until I finally found an application that worked.
Tools I have tried:
I tried DiscU, wud2app, Wii U USB Helper, NUSGrabberGUI, etc., and they all gave me issues. One or two of the tools is ran via command prompt and I wasn’t able to find some clear documentation which didn’t help. The application that did end up working for me to extract is called VGMToolbox. I will outline below the steps to follow to extract the code, content, and meta files from a .wud file.
What you’ll need:
Wii U Common Key
Game Title Key
Install both VGMToolbox an HxD Editor.
Navigate to the location vgmtoolbox > external > wiiu.
Create a new text file and call it ckey.bin.
Open HXD Editor and drag and drop ckey.bin into HxD Editor.
Paste the Wii U Common Key. Click OK on the prompt on the file size change notification.
Navigate to the directory where the .wud file is located.
Create a new text file and call it disckey.bin.
Drag and drop disckey.bin into HxD Editor.
Paste the title key for the game you’re wanting to extract. Click OK on the prompt on the file size change notification.
Navigate to Misc. Tools > Extraction Tools > Generic > ISO/Archive Extractor.
Drag and drop the .wud file into VGMToolBox. If all goes well you should see something similar to the screenshot below.
Browse the drives until you find one with code, content, and meta folders.
Right Click the parent folder ( \ ) and extract it to your desired location.
After trying so many different tools VGMToolBox was the only one I had success with. Hopefully this guide was helpful in extracting your .wud file.
Note: A common issue I’ve seen which I also encountered was “Partition TOC Signature bytes not found”. I believe it is related to the .bin, ckey.bin and disckey.bin, being created using a standard text editor. HxD Editor fixed the issue for me.