I live in a nearly wholey apple household with a number of iPads, iPhones, MacBooks, Apple TV etc. I currently have an Airport Extreme as my wireless access point and I have been considering upgrading this to a Time Capsule to provide wireless storage and backup capability. My question is, should I go for the Time Capsule or purchase an external hard drive to connect to my Airport Extreme? If I go for a hard drive, will this provide the same functionality connected via the Airport Extreme? what type of hard drive should I go for?