The Seagate Portable HDD 4TB STGX4000400 is a black external hard disk drive with a storage capacity of 4TB, suitable for use with laptops and PCs. It comes with a USB 3.0 interface for fast data transfer and has dimensions of 4.606in/117mm x 0.787in/20mm x 3.149in/80mm. The item is backed by a 1 year manufacturer warranty and is part of the Portables product line from Seagate, known for its reliable storage solutions. Made in Thailand, this portable hard drive is a convenient and efficient option for expanding storage capacity on the go.