Backup file created by San Andreas Mod Installer, a modification installer for the PC version of the popular open world action-adventure video game Grand Theft Auto San Andreas; file contains the custom modifications the user can create for use in the game, including automatic vehicle replacements (such as replacing a certain make of vehicle with another), or other modifications made to custom vehicles.

The San Andreas Mod Installer program makes adding modifications such as extra cars, new maps, custom missions and miscellaneous other original modifications to the Grand Theft Auto San Andreas game easy, and without the user having to edit the game files themselves.