BuyDig offers the Western Digital Elements 2.5TB USB 2.0 External Hard Drive, model no. WDBAAU0025HBK-NESN, for $89. With free shipping, that’s $0.04/GB, $6 below our mention from a week ago, and the lowest total price we’ve seen for this drive. (It’s also a current low by $15.) This features WD GreenPower Technology, which claims to reduce energy consumption by 30%.