WD 2TB Elements Portable External Hard Drive - USB 3.0 - WDBU6Y0020BBK-WESN 2TB Storage Capacity USB 3.0 and USB 2.0 compatibility Up to 5 Gb/s Data Transfer Speed Formatted for Windows 8, 7, Vista & XP Easily Reformat Drive for Mac Ultra-fast USB 3.0 data transfers. Massive capacity For Mac compatibility this Hard Drive requires reformatting. Refer to Application Guide for guidance on this Free trial of WD SmartWare Pro auto and cloud backup software WD quality and reliability Adding extra storage for your videos, music, photos, and files