B&H Photo Video has the Hitachi GST H3IK40003272SP (0S03355) 4TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive for
$210 with free shipping. It was $189 on Black Friday but currently goes for $260+ elsewhere. Features SATA III 6.0Gb/s interface, 7200rpm drive speed and a 64MB data buffer cache.