You may want to consider buying a prebuilt NAS unit. Buffalo sells some units that are really nice for consumers or small businesses.
Basically they are like an external hard drive except they connect to your router via ethernet and every PC on your network can access them. Very handy.
I won't be wronged. I won't be insulted. I won't be laid a-hand on. I don't do these things to other people, and I require the same from them. - John Bernard Books(John Wayne in The Shootist)