What type of file will work on psp is it cso or iso?

Both ISO and CSO files can work on a PSP, but CSO is generally preferred. Here's why:

* ISO files are the original, uncompressed images of the PSP game disc. They are larger in size and take longer to load.

* CSO files are compressed ISO files, which are significantly smaller and load faster. This makes them more practical for PSP users.

Here's a breakdown of the differences:

| Feature | ISO | CSO |

|---|---|---|

| File Size | Larger | Smaller |

| Compression | None | Compressed |

| Load Time | Slower | Faster |

| Storage Space | Takes up more space | Takes up less space |

In summary:

* If you have enough storage space and are willing to wait for slightly longer loading times, ISO files are fine.

* For optimal performance and storage efficiency, CSO files are the recommended choice.

Important Note: You'll need a compatible PSP firmware and a custom firmware to be able to run ISO and CSO files.