Buffalo OP-HD4.0N 4 TB Internal SATA Hard Drive (3.5-Inch, SATA/600)

These hard drives by Buffalo are direct replacements for TeraStation 5410DN, 5410RN. It weighs 2.1 lbs and has the dimensions of 8.8 x 6.1 x 3.8-inch. It has a Serial ATA III interface and is fully compatible with TeraStation 5410DN, 5410RN as a replacement drive of 4TB capacity.