Rocraid 2 external SATA hard drives offer the flexibility to meet diverse IT and personal storage needs for Mac and Windows users. It boosts up to 3,000Mb per second transfer rate, and combines USB and eSATA connections in a rugged elegance design enclosure. The Rocstor's Rocraid drives are designed to protect your data by supporting Raid one (1) Mirroring, Raid Zero (0) Striping and JBOD Spanning options for a rock solid redundancy and fault tolerance capability without any software GUI installation needs. Easy to deploy and easy to manage, the Rocraid 2 drives are pre-installed with two (2) SATA Hot-Swappable hard drives for unparallel reliability and simplicity. Store your future with confidence on Rocstor' Rocraid 2.