Well, I keep getting errors when backing up and upgrading the firmware for my iphone on my pc so I just did the whole thing on my Mac. Well my phone lost everything and I don't have a back up on my Mac and every time I try to restore on my PC I get the error. So can I just take the back up file and put it on my Mac itunes? Where is this file located? I really need this will all my phone numbers, calendar, etc..!