Use (the gold standard PSP emulator).
💡 If you have an existing ISO library and want to save space, download the chdman tool (part of the MAME distribution). A simple batch script can convert your entire library to CHD in minutes. If you’d like, I can help you with: The exact commands to convert ISOs to CHD yourself Finding which handheld devices support CHD best Troubleshooting PPSSPP settings for better performance psp chd internet archive