I had some contents in systems folder. System -> Library->Sandbox. Inside sandbox I had a folder. Yesterday I Upgraded to Mac OS X Lion . Now I can't find the folder. I know OS files must have been re-written. What I want to know is can those files be recovered? If there is any method to do that please anyone guide me how to do it. I want those files at any cost . It ll be very grateful if anyone help me to recover those files.