I just got a WD MyBook Essential, and I have a few questions. I read some of the other threads, and they made me more confused. Here goes. Stupid one first: Where is the product key for registration? I can't find anything on the box, device or packaging that says product key. None of the numbers that are there fit in the product key boxes on the registration page? -- Can I use Time Machine with this, or does that only work with a Time Capsule? -- Do I need to format this? I ran the Mimeo Life Agent installer, and it seems to be working. -- When I set up the backup plan, I assume I choose "removable drive"? It asks for a location, but it doesn't offer any suggestions and there's nothing on the removable drive and the option for a new file is greyed out??? -- If I want to use the MyBook for both backup and to store my iTunes music folder, do I need to partition it?