ICYCube MB561US-4SB-1 4 Bay eSATA & USB External HDD Enclosure 3 Speed Adjustable Cooling Fan, including auto setting featuring Smart Cooling Technology. 4 Bay 3.5 SATA I / II / III removable external hard drive enclosure support SATA hot-swap. Backplane with 1x high speed USB 2.0 and 1x e-SATA ports (port multiplier). Plug & Play USB 2.0 quick connection for any computer system. Multi-drive exchangeability & maintenance capabilities with simple removal of drive tray.