I lost my entire gt5 save file tonight. How it happened was very strange.I was leaving a friends online lounge and froze up. I then hit quit game but instead of exiting the game, it turned off my ps3(not the 1st time this has happened). After turning my system back on i went back into gt5 and when asked to sign in a screen came up with an agreement notice followed by a screen asking to set the resolution & screen size.The only time i could remember ever encountering those screens was when i put gt5 in for the 1st time so needless to say i started thinking worse case scenario. I immediately exited the game and went into my saved data, that's when i saw a corrupted file which replaced my original gt5 file. If it weren't for my usb drive with saved file data, there would have been no way of recovering the lost file.Like it was said unto me, PLEASE invest in a usb drive and save your game progress regularly.