Seagate BarraCuda 2.5” 4TB Internal HDD Key Features 4TB Internal HDD 5400 rpm Rotation Speed Compatible with Mac & Windows SATA 3.0 Interface 2-Year Limited Warranty Overview The 4TB Seagate BarraCuda is a high-quality HDD that delivers incredible performance thanks to its easy to use 2.5-inch form factor that is just 15mm in height and runs at 5400 rpm. The BarraCuda\'s technical highlight is its 6Gb/s interface, which is the latest SATA III standard. This drive has a storage capacity of 4TB and a 128MB Cache. Specifications Disk Type HDD External? No Capacity 4TB Rotation Speed 5400 rpm Cache 128MB Transfer Rate up to 6Gb/s Interface SATA 3.0 Compatibility MAC, Windows Dimensions 100 x 70 x 15 mm