Ok, atm I own a Dell Inspiron 1545, running Windows 7. I'm thinking about upgrading to a Mac during the Summer or whenever the next refresh is, but I need an external hard drive that I can back up my files with to wipe my Pc for now. Are there any out there right now under 100 bucks that can back up my files, it's running 64 bit now, but I'll run 32 after I back it up, please help me out.