BSA file

A BSA file (or Bethesda Softworks Archive) is a type of archive data file used to store game assets in Gamebryo and Creation Engine games (with the BA2 format replacing it in Fallout 4 and Fallout 76). Other game data such as item, character, and world space information are stored within separate ESM record files. BSA and BA2 files are found in the Data subfolder of any parent game directory (i.e. where the game's .exe file is found).
Individual files can be extracted from BSA and BA2 archives using third party tools such as Bethesda Archive Extractor (B.A.E.).Bethesda Archive Extractor Nexus Mods page
==Files present in games==
===Fallout 3===
* Fallout - MenuVoices.bsa
* Fallout - Meshes.bsa
* Fallout - Misc.bsa
* Fallout - Sounds.bsa
* Fallout - Textures.bsa
* Fallout - Voices.bsa
====Operation: Anchorage====
* Anchorage - Main.bsa
* Anchorage - Sounds.bsa
====The Pitt====
* ThePitt - Main.bsa
* ThePitt - Sounds.bsa
====Broken Steel====
* BrokenSteel - Main.bsa
* BrokenSteel - Sounds.bsa
====Point Lookout====
* PointLookout - Main.bsa
* PointLookout - Sounds.bsa
====Mothership Zeta====
* Zeta - Main.bsa
* Zeta - Sounds.bsa
===Fallout: New Vegas===
* Fallout - Meshes.bsa
* Fallout - Misc.bsa
* Fallout - Sounds.bsa
* Fallout - Textures.bsa
* Fallout - Textures2.bsa
* Fallout - Voices1.bsa
====Dead Money====
* DeadMoney - Main.bsa
* DeadMoney - Sounds.bsa
====Honest Hearts====
* HonestHearts - Main.bsa
* HonestHearts - Sounds.bsa
====Old World Blues====
* OldWorldBlues - Main.bsa
* OldWorldBlues - Sounds.bsa
====Lonesome Road====
* LonesomeRoad - Main.bsa
* LonesomeRoad - Sounds.bsa
====Gun Runners' Arsenal====
* GunRunnersArsenal - Main.bsa
* GunRunnersArsenal - Sounds.bsa
====Courier's Stash====
* CaravanPack - Main.bsa
* ClassicPack - Main.bsa
* MercenaryPack - Main.bsa
* TribalPack - Main.bsa
===Fallout 4===
* Fallout 4 - Materials.ba2
* Fallout 4 - Meshes.ba2
* Fallout 4 - MeshesExtra.ba2
* Fallout 4 - Misc.ba2
* Fallout 4 - Nvflex.ba2
* Fallout 4 - Shaders.ba2
* Fallout 4 - Sounds.ba2
* Fallout 4 - Startup.ba2
* Fallout 4 - Textures[1-9].ba2 (9 individual files)
* Fallout 4 - Voices.ba2
====Automatron====
* DLCRobot - Main.ba2
* DLCRobot - Textures.ba2
* DLCRobot - Voices_en.ba2
====Wasteland Workshop====
* DLCworkshop01 - Main.ba2
* DLCworkshop01 - Textures.ba2
====Far Harbor====
* DLCCoast - Main.ba2
* DLCCoast - Textures.ba2
* DLCCoast - Voices_en.ba2
====Contraptions Workshop====
* DLCworkshop02 - Main.ba2
* DLCworkshop02 - Textures.ba2
====Vault-Tec Workshop====
* DLCworkshop03 - Main.ba2
* DLCworkshop03 - Textures.ba2
* DLCworkshop03 - Voices_en.ba2
====Nuka-World====
* DLCNukaWorld - Main.ba2
* DLCNukaWorld - Textures.ba2
* DLCNukaWorld - Voices_en.ba2
===Fallout 76===
* SeventySix - 00UpdateMain.ba2*
* SeventySix - 00UpdateStream.ba2*
* SeventySix - 00UpdateTextures.ba2*
* SeventySix - 00UpdateVoices.ba2*
* SeventySix - Animations.ba2
* SeventySix - EnlightenExteriors01.ba2
* SeventySix - EnlightenExteriors02.ba2
* SeventySix - EnlightenInteriors.ba2
* SeventySix - GeneratedMeshes01.ba2
* SeventySix - GeneratedMeshes02.ba2
* SeventySix - GeneratedTextures.ba2
* SeventySix - Interface.ba2
* SeventySix - Localization.ba2
* SeventySix - Materials.ba2
* SeventySix - Meshes.ba2
* SeventySix - MeshesExtra.ba2
* SeventySix - MiscClient.ba2
* SeventySix - Shaders.ba2
* SeventySix - Sounds01.ba2
* SeventySix - Sounds02.ba2
* SeventySix - Startup.ba2
* SeventySix - StaticMeshes.ba2
* SeventySix - Textures01.ba2
* SeventySix - Textures02.ba2
* SeventySix - Textures03.ba2
* SeventySix - Textures04.ba2
* SeventySix - Textures05.ba2
* SeventySix - Textures06.ba2
* SeventySix - Voices.ba2
* SeventySix - WorkshopIcons.ba2
* - 00-prefixed archives are update content
==References==
Category:Fallout 3 technical information
Category:Fallout: New Vegas technical information
Category:Fallout 4 technical information
Category:Fallout 76 technical information
Category:File formats