1TB HDD 120GB SSD SATA 6 Gbs Interface SATA 6 Gb/s Form factor 2.5-inch Data transfer rates: Interface speed Internal transfer rate (read, max) Internal transfer rate (write, max) 6 Gb/s 350 MB/s. Introducing the WD Black dual drive, a revolutionary storage device that is specifically designed for the modern enthusiast whether you are a creative pro, gamer or PC builder. WD Black is the fusion of a fully accessible solid-state drive for your operating system and a generous capacity hard drive for personal data and large files. It is the must-have upgrade solution for your single drive PC, fueled by the power of two and inspired by you. MASTER PACK