I started runnIng out of room on my 320 an got a terra an half of space plus an esata dock. Partitioned the drive attached to the unit. Thought that is why it couldn't see it. I installed the bracket adapter with little issues. No instructions are with it an is a powered e sata hdd dock from computer geeks. I attached the power an the Sata cable to the board an doesnt see the drive at all.