Hard Drive Question

My dad bought me a Barracuda Ultra ATA/100 80gb hard drive for christmas. I don't really want it because I've read its slow, but I need the space since my hard drive has around 700mb left. Is it worth it to install it just for storage space?

Or, in plain words: Unless you plan on capturing several HD-streams in full resolution at the same time, or run a database with several hundred users logged on, you won't max out any available harddisc. Slow.... jeezus, kids these days...