The term refers to the OBB file (Opaque Binary Blob), which contains the game’s assets—graphics, textures, maps, bus models, and sounds. While the APK (Android Package Kit) is the application itself, the Obb file is the data that makes the game look and sound impressive. You cannot run Bus Simulator Indonesia 3.7.1 properly without the matching Obb file.
: This usually happens if the OBB is in the wrong location or the file is corrupted. Try re-extracting the file. (like the Bangladeshi map) or help fixing a specific error during setup? Bus Simulator Indonesia 3.7.1 Obb