The "Mediafire" part of the keyword points to , a popular free file-hosting service. Users prefer Mediafire because it offers faster free downloads compared to torrents and has fewer intrusive ads than other file hosts (though it's not ad-free).
Before proceeding, ensure you have the necessary specifications and requirements to run the game smoothly on your PC. Here's some general information about GTA SA and its system requirements: gta sa highly compressed pc 500mb mediafire
If you actually want to play GTA San Andreas on a low-spec PC or with a small download, do not use the 500MB Mediafire spam. Use these legal, safe methods. GTA SA Highly Compressed PC 500MB Mediafire: Is
The original 2004 PC version of GTA SA typically requires of disk space. Modern remasters, like the Definitive Edition , require upwards of 19GB . A 500MB file usually achieves its small size through: Game installer (compressed) — ~500 MB Readme