My iMac's hard drive has been clicking a lot lately and a quick search revealed I've got on the problematic 1TB Seagate drives that Apple started a replacement program for, so I'm planning on taking it to the genius bar next week. The problem is I don't have an external drive big enough to backup to. Is there any chance the genius bar might offer to transfer my data to the new drive? Has anyone had this happen before, or will it definitely be a fresh and empty drive with just the OS on it? Small Print: Before anyone asks if I have a backup, I do… but to a cloud backup service. But I recently temporarily moved somewhere with only a 1Mb connection and so a re-download on this connection would take days if not weeks, so avoiding that as a last case scenario.