Mediasonic PROBOX 4 Bay 3.5" SATA Hard Drive Enclosure - USB 3.0 & eSATA Support 12TB HDD (HF7-SU3S3) (Black) Support all brand of 3.5" SATA I / II / III hard disk drive up to 12TB per drive, and up to 4 x 12TB. (Not compatible with 4Kn Native Drives) Support SATA 3 6.0Gbps hard drive transfer rate Transfer rate up to 5.0Gbps via USB 3.0, Transfer rate up to 6.0Gbps via eSATA Support S.M.A.R.T. and Power Sync Smart Fan with built-in thermal-sensor, Auto & Manual modes, and 3 speed levels. One button interface selection. Thermal-Sensor Built-In Auto &amp; Manual mode 3 level of speed Compatible with both PC and MacUSB 3.0 interface Transfer rate up to 5.0Gbps via USB 3.0 Transfer rate up to 6.0Gbps via eSATA. One Button interface selection: Switch USB 3.0 or eSATA interface by pressing one button