As far as I know (other than a hardware fault of course) there are two ways that your hard work on that save can get corrupted. Both involve the PS3 doing its Autosave.
If there is a Power Cut at the wrong moment then the Save process can get interrupted. This is unavoidable, but OK if your save is backed up to a USB stick of course.
The avoidable corruption, I suspect is caused by Quitting the game at the wrong moment. That nice little "Saving Data" appears in the bottom right corner of the screen and if you Quit while this is happening, I suspect that is the time when Saves can get corrupted. It is easy to get impatient when you want to leave the game.
Being overcautious with my saves, as I don't want to lose all the work I have put into the game so far, I now Quit GT Life when I have finished with the game. It takes about 10 seconds to get back to the main menu and from there it is a lot safer to Quit to the XMB. At least you can backup your save to a USB with reasonable confidence!
If there is a Power Cut at the wrong moment then the Save process can get interrupted. This is unavoidable, but OK if your save is backed up to a USB stick of course.
The avoidable corruption, I suspect is caused by Quitting the game at the wrong moment. That nice little "Saving Data" appears in the bottom right corner of the screen and if you Quit while this is happening, I suspect that is the time when Saves can get corrupted. It is easy to get impatient when you want to leave the game.
Being overcautious with my saves, as I don't want to lose all the work I have put into the game so far, I now Quit GT Life when I have finished with the game. It takes about 10 seconds to get back to the main menu and from there it is a lot safer to Quit to the XMB. At least you can backup your save to a USB with reasonable confidence!