This Seagate Exos 7E8 4TB 7.2K 3.5" 12Gbps SAS Hard Drive is a brand new item that comes with various features. It supports hot plug and hot swap, and provides cloud storage. The drive type supported is HDD, and it has a storage capacity of 4TB with a cache of 256MB. The interface of the item is SAS and its height is 1". As for the form factor, it is 3.5". This internal desktop drive is compatible with computers, tablets, and networking devices. The model number for this item is ST4000NM003A. Main Specifications Capacity 4TB Device Type Hard drive - internal - Format (512n SAS) Dimensions (WxDxH) Height 1.028 x Width 4.010 x Depth 5.787 in Form Factor 3.5in Weight 1.58 lbs Interface SAS3 12Gb/s Interface Type Dual Included Qty 5 Optical Storage Buffer Size 256MB Cache Hard Drive Spindle Speed 7200 Performance Average Latency 4.