Unlike CD-based games, PSP games must be compressed using the with a specific hunk size for best performance in PPSSPP. Easily Convert PSP ISO To CHD For PPSSPP
If you use (on PC, Android, or iOS), CHD support is now baked in. You don't need to do any extra setup; simply point the emulator to your CHD folder. This makes it an ideal format for cross-platform play, as the same file will work seamlessly across all your devices. How to Get Started psp chd internet archive better
The main counter-argument against CHD has historically been compatibility. However, the landscape has changed: Unlike CD-based games, PSP games must be compressed
Do you run CHD on your Steam Deck or phone? Let us know your compression ratios in the comments below. Unlike CD-based games