Re: Disk or disks
Yes, you can do exactly that, although you need to remember to do it manually (triggered from the utility). It's also USB 2.0 only.
But this brings me to the point I really need to make, which is that I'm starting to go off these products. I still like 'em a lot, of course, but Apple has oversimplified them in recent years with their utilities, and what were once really great, reliable products with enough room for "Pro" users have now been transformed into horribly "Dumbed down" devices for ... for everybody else. This wouldn't be a problem if there were other contenders on the market that took their place, but there aren't; AirPort and Time Capsule are simply among the most smooth and reliable consumer-level products available. At best, my advice to anybody buying these is to remember that they are base stations first and foremost, so if you would like advanced router functionality (applicable to PPPoE users especially) you should only expect to use them in "Bridge mode", which means they're just access points and network-attached disks. Your modem/router then provides all the firewall/NAT/whatever, which most will anyway. Turn off the other wi-fi network, and maybe you can see reliability improvements all the same. I, myself, and reduced (promoted?) to using a Cisco 881W as firewall/IPv6 router/PPPoE terminator (full 1500-byte MTU on BT's network). My recent rant on the subject:
Again, I really do like AirPort, but think people should realise what they're buying.