Open the extracted folder. If there is a Setup.exe or unpack.bat file, run it to finalize asset rebuilding. If the folder already contains gta_sa.exe , the game is ready.

Downloading "highly compressed" files from third-party hosting sites like MediaFire carries significant risks:

1GB to 5GB of free space (depending on decompression) The Extraction Process

If the game crashes on startup, right-click gta_sa.exe , select "Properties", navigate to the "Compatibility" tab, and check "Run this program as an administrator".