Relying entirely on the Internet Archive isn't always necessary. If you have your own physical UMDs or existing ISO/CSO files, converting them to CHD is simple. This also keeps you on the right side of copyright law.
Result: You have slim, lossless backups. This is the safest, most legal route. psp chd internet archive
Warning: Original PSP firmware does not recognize CHD files. You need: Relying entirely on the Internet Archive isn't always
Best practice: Use CHD for emulation on PC and mobile. Use ISO or uncompressed for original hardware. Best practice: Use CHD for emulation on PC and mobile