Here's my situation: Up to this point, I've kept all my photos on the hard drive of my Mac, with a Time Capsule backup to an external hard drive, which I fairly regularly switch out so that I have a copy offsite that's mostly up to date; not perfect, but I think reasonably safe. It would be great, though, to be able to access all the photos from multiple computers, so I just bought an Airport Xtreme, and have it hooked up as my router, with a hard drive attached to it so all our various computers can access it as a server. So far so good. However, if I'm going to keep all my precious photos on an external hard drive, I'm really worried about backups - what is the best way to arrange a continuous backup of that external server hard drive? I'd prefer to have it be a physical external drive, since there are about a terabyte of photos on there, and I'd like to avoid paying for cloud storage for that amount of data, but tell me if I'm just going to have to suck it up and do cloud storage. I'm not incredibly tech savvy, so fairly step-by-step help would be much appreciated.