Yusuf Goolamabbas

Got this via Ali Ebrahim who recently purchased a Time Capsule but the information should be valid also when using an external USB disk connected to an Airport Extreme Base Station

Basically it is that for the AirDisk you have some options:

1. Entire disk password
2. User account based passwords

You’d generally want to do (2) and the gotcha is that you can’t switch between the two without wiping all data on the disk clean.

Another gotcha is that you can’t migrate your existing TM backup to an AirPort enabled AirDisk. Meaning that whatever history is stored in your existing TM backup would be lost.