I have a question. I did a quick search but I haven't seen this particular question answered.... if it is somewhere, I apologize, I missed it. At any rate, with our usage, the HR20 works pretty well for us as far as how much recording capacity it has, so long as we're home during the week and can at least watch a few of the shows we have recording. If we're gone for a week, we're down in the 15% available range when we get home. So, I've been kicking around adding an eSATA device.... I've seen alot of people adding raids with 2 750GB drives... This is a little bit of overkill for me, I think. The storage space is almost good enough, so I'm thinking something along the lines of a single 500GB external drive would provide me with just enough extra storage that if I'm dont' get the time during the week to watch any of our shows I"m not up against it storage wise when the weekend comes and we get a chance to catch up. I'm just wondering if there's any disadvantage to this solution that I'm overlooking. Aside from the obvious extra storage I could obtain by doing a raid, is there any other reason why it would be better to go with a raid as opposed to a single drive solution?