iso's aren't illigal first off all iso is a format that contains a disk image it is used for other things also then psp. you can always make a back up from your own game in iso format and use it later for PERSONAL use. Sony can mayby say they own the umd format but that doesen't makes it illigal to make back-up as you have a personal use licence for your umd so keep that in mind. Mayby the laws in us are diffrend but that's wath i know for most country's in europe.

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