Fix: Go to PPSSPP > Settings > Graphics > Rendering Mode > change from "Buffered rendering" to "Skip buffer effects" (may reduce graphics). Also, disable "Simulate block transfer".
Once you have a verified MediaFire link (example format: https://www.mediafire.com/file/xxxxx/GTA_San_Andreas_PSP.iso/file), follow these steps: gta san andreas ppsspp iso file download mediafire verified
Fix: Rename at3 audio files in the ISO (advanced users only). Alternatively, download a "cutscene fix" patch from the same forum where you got the ISO. Fix: Go to PPSSPP > Settings > Graphics