WUX files play a crucial role in loading game assets and levels in BOTW. When you play the game, the WUX files are loaded into memory, allowing the game to access the necessary data to render the game world, animate characters, and play audio.
: BotW often requires a system update to launch. These are typically provided as separate folders (not files) and must be installed via Install game title, update, or DLC botw wux file