: The .ucas (Unreal Content Addressable Store) extension indicates a "container" that holds compressed game data like textures, models, or audio.
This file is a specific data component used by , a popular third-party tool for Fortnite skin swapping. It belongs to a modern file system used by the Unreal Engine to handle game assets efficiently. What is this file? pakchunk20-SaturnClient.ucas
: The "Table of Contents" used by the game to find specific items within the .ucas . What is this file
: A digital signature used to verify the file's authenticity. Important Considerations Unleash Saturn V3: The Ultimate Fortnite Skin Changer To work correctly
: A legacy container often used for loose files like fonts.
: While standard Fortnite files are named pakchunk[Number]-WindowsClient.ucas , files with "SaturnClient" in the name are generated or modified by Saturn Swapper .
The file is part of the system introduced in Unreal Engine 4.26 and 5. To work correctly, it typically requires three companion files in the same folder: .ucas : The actual asset data (the largest file).