Thank you for this step-by-step lesson. Apart from a skinned finger joint and playing hide and seek with a mounting screw, my 2TB Airport Time Capsule now has a 5TB Seagate drive that fit perfectly into the rubber mounting blocks. Those pesky micro connectors are not designed to be fitted by fat old Western fingers. And yes, having fiddled with Macs of yore, I too have leart it pays to test a drive in situ before reassembling.