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| Format | Compression | Compatibility | Best For | | :--- | :--- | :--- | :--- | | | None (1:1 copy) | 100% (All emulators & hardware) | Preservation; games with heavy cutscenes (e.g., Crisis Core ). | | CSO | High (Zlib/LZ4) | 99% (Some emulators lag) | Storage on Retro Handhelds (Anbernic, Miyoo). Use Level 2 compression. | | PBP | Ultra High | 95% (PSP only, not PS Vita native) | PS3 Remote Play; Converting PS1 games to run on PSP. |
While "ISO" is the standard, you may encounter other formats in a PSP archive: : The uncompressed, standard image format. Psp Iso Archive
PSNCollectionByGhostware directory listing - Internet Archive | Format | Compression | Compatibility | Best
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