MicroNet Fantom Gforce/3 Pro 1.5 TB External Hard Drive (GF3B1500U) Holds: Over 450,000 digital photos. Over 24,000 hours of music. Over 1500 hours of digital video. Over 700 hours of DVD quality movies. Comes with 2GB free cloud backup for 6 months. For Mac compatibility this Hard Drive requires reformatting. Refer to Application Guide for guidance on this The USB 3.0 connector allows transfer rates up to 10 times the rate of USB 2.0. Power Supply: 110/220 V (Universal Power Supply) OS Support: Apple Mac OS X 10.6 or later, Microsoft Windows Vista / 7, Windows Server 2003 / 2008