BSA File Documentation

Overview

Feature Value
File Extension .bsa
File Type Bethesda Softworks Archive
Developed by Bethesda Softworks
Format Type Binary
Primary Use Storing game data (textures, meshes, sounds, etc.)
Used By The Elder Scrolls and Fallout series
Compression Yes (varies by game version)
Support for Directory Structure Yes
File Header Contains file identifiers and metadata
Archive Flags Determine specifics of the archive's content and structure
Version Indicates specific version of the BSA format
Folder Records Describes the folders within the archive
File Records Describes the files within the archive
Filename Support Yes
Filename Encoding Varies (can be ASCII or other encodings)
Archive Size Limit Depends on the game and engine version
Filename Length Limit Varies by game version
MIME Type application/octet-stream
Editable Yes, with specialized tools
Multiple Versions Support Yes, supports various versions for different games
Streaming Support No
Encryption Some versions support file name encryption