The Seagate Stkr4000400 Expansion Desktop 4tb External Hard Drive in black is a high-capacity external drive designed for use with laptops, PCs, Macs, and Android devices. With a storage capacity of 4TB, this USB 3.0 drive is perfect for expanding storage space on your device. The drive is compatible with HDD drive types and features a simple USB port for easy connectivity. The Seagate Expansion product line ensures reliable performance and data transfer.