The Logi Link docking station means that you can connect 6.4 cm (2.5") & 8.9 cm (3.5") SATA & 8.9 cm (3.5") IDE hard drives 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) 2.0 cable supplied. The SATA hard disk can then be plugged into the docking station at the top or an IDE hard disk can be connected to the port on the front. The power & data flow are displayed by LED lights. By pressing the eject button the hard drive can be disconnected & then removed.