EZOPower USB 3.0 External HDD Hard Drive & SSD Docking Station for 2.5 & 3.5 inch SATA / SATA II /SATA III- Supports 4 TB HDD Plug and play design; easy to use.LED indicator: Red shines for HDD R/W.Horizontal Tool-Free HDD installation design with excellent heat dissipation. HDD automatic sleep and One Touch Backup button function.USB 3.0 high speed interface with data transfer speed up to 5 Gbps. Support the latest USB 3.0, downward compatible with USB 2.0. Compatible with Windows 98/2000/XP/Vista/7/8. * Linux/Mac OS 9.x or above (One touch backup software not supported). Fit for such as Western Digital WD Red NAS 3.5 Inch SATA III Hard Drive, WD Caviar Green/WD Caviar Blue 3.5 inch Desktop Hard Drive