Hi thankyou for your response, I'm going to try some of your other notes next but I thought I could do this quickly for you now.
So edit: I had already reset the game to factory settings which is what seemed to fix it for two days. Then I think when I tried to play an old save the game broke again so it could be one of the saves? However when I initially went back on to test the game folder by folder, my old save worked perfectly. But two days later it broke on the same save, which is when I emptied the tray folder because I thought that might be causing a lag.