With the logilink docking station you can connect up to two 64 cm 25 and 89 cm 35 sata hard disks to your computer without using a pc or external hard disk casing connecting to the computer is easy with the usb 30 cable included the power supply and data flow are displayed by led lights and pressing the eject button disconnects the hard disk so it can be removed if two hard disks are connected the clone function can be used to clone the hard drives without a pc