External hard drive with 18TB of storage provides ample space for your vast digital library of games, movies, music, pictures, documents, and more Maximum data transfer speed of 5,000MB/s lets you move files with ease Connect to your PC or Mac via USB 3.0 (USB 2.0 backwards-compatible) Includes WD Discover software featuring backup, security, and drive utilities Automatic backups and compatibility with Time Machine (note: may require reformatting) helps you keep your data for the long run