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How to Make a PSP CSO Smaller

Compressed ISO (CSO) files give PSP owners more room on their storage media. Many times CSO files can be only half the size of the ISO files from which they were created. The Sony PSP games can be created into ISO files and then into CSO files. The CSOs are then saved inside the PSP memory card and played directly from there. Making the CSOs smaller can be done using a special PSP program.

Things You'll Need

PSP ISO Compressor

Instructions

- 1
  Download and install "PSP ISO Compressor" using the developer's download link.
- 2
  Open PSP ISO Compressor and click the "ISO->CSO" option. Click the "Input File(s)" button to open a file browsing window.
- 3
  Select the ISO file that you have on the computer and click "OK."
- 4
  Click the "Output File(s)" button and select a folder on the computer to save the CSO file once it has been compressed.
- 5
  Click the "Convert" option at the bottom of the PSP ISO Compressor window to compress the ISO file into a much smaller CSO file.

Sony PSP