I back up all my videos. I don't have a server, I wish I had. I started out with a 300G Maxtor and thought that I was all set . . . that I'd never need another ext hdd, but I did. So I bought another one, and then another one. Then I saw that the 320G ext hdds were about the same price and I was running out of room, so I bought a few of them, at different times. Then when I didn't think I could possible fill up another 300G ext hdd, I bought a 250G hard drive, and then another one. Then I had to buy a couple more 500G, and the price was very reasonable because the 750G's had come out. When I ran out of room, I bought a 750G hdd, then another, and then another. I'd never heard of a server until about 6 months ago but I already had all my ext hdds. I looked into servers and they're very expensive. The files on my hard drives are explicitly for me and my family. I believe in the copyright laws, but a 5 year old can ruin a DVD in less than a day, and my daughter wants to preserve her original Disney DVDs.
I began by backing up my music, which took about 80G. Then I backed up my grandson's cartoons and my daughter's Disney DVDs that she had since she was young. I backed up my DVD's and I have a host of them. I buy DVDs of old TV shows, from my generation, and I put them on my ext hdds. I have a reclining chair at my desk and a 19" LCD monitor so when I want to watch something, it's much easier and comfortable to sit back and watch them on my pc than putting them in my DVD player and sitting on my couch, which isn't comfortable. Right now, I'm backing up The Walton's DVD's, and that show had 9 seasons. I have all the ER eps except for this season, which hasn't come on the market yet. And those are just a couple examples.