?80 mm Silent Fan? The 4 Bay USB 3.0 SATA hard drive enclosure is all Aluminum design. Built- in 80 mm silent fan; With front and rear Meteor cooling holes. An ultra durable aluminum cg provides efficient heat dissipation, plus an extra 80mm rear fan accelerate air convection and keeps your drives cool during long hours of operation. ?Additional Storage Space? Expand the capabilities of your laptop/computer and declutter your workspace with the 4 bay hard drive docking station. The protocol of interface support up to 6Gbps transfer rate.Connecting the 4 bay hard drive docking station to the computer that UASP supported to get the fatest speed. This solution will provide ideal storage for demanding workflows. ?6Gbps Transfer Speed? This 4 bay hard drive enclosure adopt SATA III protocol,transfer rate up to 6Gbps (MAX). Supoort UASP, which makes it 20% faster than conventional USB 3.0.Compatible with most Windows and Mac systems . ?For 2.5"/3.5" HDD & SSD? Yottamaster 4 bay hdd enclosure designed for both 2.5" SSDs where speed is the priority and for 3.5" HDDs when it's important to maximize the storage capacity. The removable aluminum trays allow for easy installation and replacement of the drives. Your hard drives can be firmly fixed on the tray by provided screws,which can effectively protect your hdds from shock and interface damage. ?4 x 18 TB Enterprise-class Storage Solution? Yottamaster 4 bay hard drive caddy supports 4 hard drives with a maximum capacity of 72 TB and 18 TB for single disk. With four indicator lights to monitor the working status of each hard drive. Plug-and-play hot swapping. Perfect for memory-intensive applications like audio / video editing or digital photography.