MicroCenter offers the Western Digital 4TB My Book Studio Edition II eSATA / FireWire 800 / USB 2.0 External Hard Drive in White, model no. WDH2Q40000N, for $259.99. Shipping adds $5.99. At $0.07/GB, that's the lowest price we could find by $9. This system features two 2TB drives, capacity gauge, and RAID support. Although formatted for Macs, it can easily be reformatted for a PC.