Staples once again offers the Seagate Expansion 2TB USB 2.0 External Hard Drive, model no. ST320005EXA101-RK, for $79.99. (OfficeMax charges the same.) With free shipping, that’s $0.04/GB and the lowest total price we could find by $4, although we saw this drive for $5 less in February. Sales tax is added where applicable. This 3.5″ hard drive runs at 5900 rpm and has a 32MB cache.