This Seagate 1TB Expansion External Hard Drive is compatible with a variety of devices, including iPhones, laptops, PCs, memory vaults, iOS, Mac, and Android. It has a USB 3.0 specification and a storage capacity of 1 TB. The item dimensions are 4.52in x 3.07in x 0.46in and it has a form factor of 2.5in.This external drive supports both HDD and SSD drive types and has a cache size of 32 MB. It features cloud storage and adaptive memory technology. The Seagate One Touch product line is designed to make backing up and transferring files easy and efficient.