no, you wouldn't need to if you did it once a week..but then again how much stuff are you moving around on your harddrive? and how often?

i have 90 gigs and stuff is being written all day everyday from kazaa, dc, and hotline.

oh yeah and i defrag every 9 months or so lol..

i'm surprised my drives are so durable..anyway i've had my drives for 3 years