Seagate Expansion Drive 4TB External HDD Key Features 4TB External HDD 5400 rpm Rotation Speed Compatible with Mac & Windows USB 3.0 Interface 2-Year Limited Warranty Overview The Seagate Expansion portable HDD adds extra storage instantly. Seagate Expansion offerings are built to make file storage faster and easier, while clearing extra space for your devices. Not only do they add instant storage capacity, but they help prevent your computer’s performance from declining. With 4TB of extra space and a spin speed of 5400rpm, you will enjoy instant access to all your data with ease. Box Contents Expansion Portable HDD USB 3.0 Cable Quick Start Guide Rescue Data Recovery Services Specifications Disk Type HDD External? Yes Capacity 4TB Rotation Speed 5400 rpm Cache Transfer Rate up to 5Gb/s Interface USB 3.0 Compatibility Windows, Mac Dimensions 117 x 80 x 21 mm