I'm a bit of a newbie with setting up a NAS, so I apologize if this is a question that has been asked a million times. I recently installed a 128GB SSD in my MBP. It really just doesn't give me enough room to store all of my music & movies like my old HDD did. I was thinking the solution might be to buy a NAS. I'd like to have a hard drive attached to my Airport Extreme that I can store all of my files on, and it automatically mounts when I'm connected to my home network, and will seamlessly work w/ itunes. When I'm on the road, I'd still like to be able to mount it on my desktop (from an outside network), and proceed as if i'm still attached to my home network. So anywhere I have internet access, I can access my music & movies from my home NAS. Is this possible? Can it be done easily and cheaply? Can anyone recommend a NAS to purchase or a solution? I want to hack this together cheaply, so I don't really want to spend more than $115 or so. Thanks for your help!