Depending on where the file was sourced, it usually contains one of the following:

Archives often house STL files for printing miniatures of Space Marine units. Technical Specifications

If you are using these files for the games, keep these storage and system requirements in mind: Game Title Typical Storage Required Key Requirement Standard HDD/SSD Space Marine 2 (2024) 75 GB - 160 GB SSD Required How to Use the File

If it's a mod or save file, it must be placed in specific directories, such as the client_pc/root folder for mods or %LOCALAPPDATA% for saves.

Players often share ".zip" archives containing completed save files or specific campaign checkpoints. For the Anniversary Edition , these are typically placed in the Steam userdata directory.