Expansion portable hard drive 4TB STKM4000400 The Seagate Expansion portable hard drive is compact and perfect for on-the-go. Instantly add storage space to your computer and take large files with you when you travel. Specifications: Capacity 4TB Dimensions: L x W x D 4.539in/115.3mm x 3.149in/80.0mm x 0.496in/12.6mm Weight 159g/0.351lb System Requirements Compatible with most Windows and macOS systems. USB 3.0 port (required for USB 3.0 transfer speeds) What's Included Seagate® Expansion portable hard drive 18-inch (45.72cm) USB 3.0 cable Quick Start Guide