If this is a desktop, do you have room for another HDD? they are much faster and much cheaper. are not difficult to install. take off cover, cram hd into space, plug in 2 cables, put cover back on.
OR, take cover off, plug in two plugs, drop hdd on bottom of case. do stuff, then take the hdd back out. I swap 2 or 3 into my desktop.
Circuit City has a new flavor of external and internal (150-250gb)for sale each week. usually about $60 after rebate. they have free shipping(i do not see hawaii excluded).
last week, office depot had a 100gig for sale. $80, with $50 rebate. free shipping for over $50. so they shipped it for free, and i sent in the rebate. on the box, "20 free gigabites!!"". they shipped a 120 gig hd.