Western Digital Caviar Green 3TB 64MB Cache Internal Hard Drive for $99.99 shipped. In addition, receive Rosewill SATA III cable wit Locking Latch for free with promo code FREESATACBLE. Here is a screenshot for reference. This is part of WD’s GreenPower lineup, which reduces energy usage. It features 64MB cache and uses SATA 6.0Gb/s interface. Note that it comes in OEM packaging, which means no pretty retail box but is otherwise identical.