If the ps3 turned off while it was saving or loading something, it may have corrupted the ps3.
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Look at the game disc and make sure it is not scratched or dirty.
delete the data and puted in your psp
That means that you turned off your game when it was saving, and you lost your data.
On playstaion you must format the hole hardrive. But be careful it gets rid of all your data
im so sorry but im afraid you lose everything... it will think you just got it out of the box