hdd docking station

Hi there, Recently I've decided to update my hard drives to increase the overall data capacity. I've chosen HGST 6TB UltraStar 7K6000 7.2K 128MB SATA III 3.5' and a 4TB one, also by HGST. They are a typical high-durability server-grade drives. I own a docking station - Natec Kangaroo Dual, just...