You can find the ISO file by searching popular game repositories or forums. Alternatively, you can legally dump the game file from your own PSP disc if you own a physical copy.
A: CSO is compressed and saves space (approx 900MB vs 1.4GB), but may cause slight stuttering. ISO runs smoother. Use ISO for the best experience. gta san andreas ppsspp iso file download for android link
If you experience lag or low FPS while playing, try adjusting these settings within the PPSSPP menu: You can find the ISO file by searching