With this 2bay USB 2.0 and eSATA hard disk box it is easy to add 2 Serial ATA hard disks to a fast eSATA or USB 2.0 port. Add 2 independent drives or add 1 large volume using JBOD. Choose for the speed of RAID 0 or don't take a risk and use the RAID 1 feature for total security. This hard disk box is perfect for adding a large amount of fast storage capacity to your computer or notebook