WUPServer is also used for modding, with WUPServer you can replace files in the games with modified ones.
The other way to install mods is to make a fake update containing all the modified files, but that takes up extra space. (For example a update to undub Xenoblade Chronicles X is around 5GB)
The other way to install mods is to make a fake update containing all the modified files, but that takes up extra space. (For example a update to undub Xenoblade Chronicles X is around 5GB)