An analogy! I have over 120GB of mp3s (~20,000 songs) in my music collection. I will never listen to them all, as a matter of fact, I probably tend to just listen to about 3,000 or so of the same songs over and over again. Does that mean I'm wasting space on my computer??? Hell no!!! There's nothing like having someone say "Do you remember that song from <insert artist here>?" and me saying, "No I don't remember that song, but I have it!!!"