features massive capacity and WD quality and reliability. It includes a free trial of WD SmartWare Pro backup software for local and cloud backup. Features: Ultra-fast USB 3.0 data transfers. Massive capacity in a sleek design. Compatible for Wins and for Mac(requires reformatting). Free trial of WD SmartWare Pro auto and cloud backup software. WD quality and reliability. Compatible with USB 3.0 and USB 2.0. Adding extra storage for your videos, music, photos, and files, and share all of your digital life.