I want to backup my Macbook to my external harddrive up it's formatted in Windows. Is there a way I can back up my Mac to it? Or do I need another location? When I try to back it up with SuperDuper it comes up with this. "SEA_DISC is formatted as MS-DOS FAT32, which cannot properly host HFS+ files along with all their attributes, resources and ownership. To use SEA_DISC with SuperDuper!, use Disk Utility to erase it, selecting "Mac OS Extended" or "Mac OS Extended (Journaled)" as the format."