The Logi Link USB (Universal Serial Bus) 3.0 docking station means that you can connect 6.4 cm (2.5") & 8.9 cm (3.5") S-ATA hard disks to your computer without opening the PC or using an external hard drive. It can be easily connected to your computer using the USB (Universal Serial Bus) 3.0 cable supplied. The hard disk can then be plugged into the docking station at the top. Power supply & data flow are indicated by LEDs & the hard disk can be ejected by pressing the eject button.