Hi! I recently bought my new 21,5" iMac with it's highest Capacity with Fusion Drive and I want to extend that Storage wireless by connecting it to my new '13 TimeCapsule via USB. Setup and using it is easy, but how can I create a Backup of that external HDD within my TC? If I go to settings, I can just include external Storages, that are connected to my Mac. Thank you a lot for any ideas.