Capacity: 1 TB and 2 TB Interface: USB 3.0 and USB 2.0 Compatibility: Formatted NTFS for Windows® 10, Windows 8.1. Reformatting may be required for other operating systems. Compatibility may vary depending on user’s hardware configuration and operating system. Dimensions (L X W X H): 110.5mm x 82mm x 15mm Contains: USB Cable Features: USB 3.0 and USB 2.0 compatibility Fast transfer rates Massive Capacity In A Small Enclosure Improve PC performance