Western Digital Elements 640GB USB 2.0 External Hard Drive for $69.99. Add any filler for $5.02. The example used here is Staples Perforated Writing Pads (12-Pack) for $5.99, so the total is $75.98. Get a $25 off $75 coupon here or here. Be sure to pick one that is for online use and has instant e-mail delivery. After applying the coupon, the total comes to $50.98 shipped plus coupon cost.