My external HD attached to my iMac died. With it, my iTunes library. I need to update my iP4 but I want to sync it to my MBP now. What will happen when I plug it into my MBP for the first time? There are no apps or music on it. I have the phone set to manually manage music and videos. Will it just save everything to my MBP? (contacts, apps, videos.. etc.) and create a new back-up file? Or will it want to set it up as new? Thanks for any insight.