Avoid it. Most files are fake, broken, or dangerous. The few that work are unofficial mods with missing audio, broken missions, and crashes.
You can find unofficial, fan-made builds that run San Andreas content on PPSSPP, but expect bugs, missing missions, or crashes. Gta San Andreas Ppsspp Iso File Download Mediafire
Once you've downloaded the GTA San Andreas PPSSPP ISO file and installed PPSSPP, follow these steps to configure the emulator and play the game: Avoid it
This is the most critical section. protects GTA San Andreas. Rockstar Games and Take-Two Interactive own the rights. Avoid it. Most files are fake
Archive.org (for homebrew and legal abandonware), CDRomance (curated PSP ISOs with user feedback), or your own ripped discs.