The NexStar HX, 3.5" SATA III Hard Drive Enclosure USB 3.0 with Fan is a totally redesigned enclosure. This sleek enclosure will keep your hard drive safe and cool. It features a hard aluminum case and tray that effectively draws away the heat while an active-controlled 60mm fan pushes cool air through the enclosure ensuring your hard drive is cooled while in use. This NexStar HX comes with smart and green features to extend the life of the drive by spinning down when the system goes to sleep thus saving energy when it is not in use. With the latest UASP protocol and SATA III 6Gbps support, transferring and backing up files are faster. This NexStar HX product is a name that stands for solid and durability, it will last for a very long time.