This eSATA/USB Removable SATA HD Enclosure features a convenient trayless design that eliminates having to mount the hard drive in the enclosure, making it easier to access data on the fly. Simply insert any 3.5"" SATA II (SATA /300) or SATA (SATA /150) hard drive (up to 1.5TB capacity) into the enclosure, close the panel door and connect the enclosure to the computer through either eSATA (external SATA) or USB. To remove the hard drive from the enclosure, simply open the panel door and pull the drive out. Because the SAT3510BU2E drive enclosure can be connected to a host computer through either eSATA or USB, you can rely on efficient data transfer speeds (up to 3Gbps for eSATA, 480Mbps for USB 2.0) and quick connectivity. The enclosure is constructed to provide a durable housing for inserted drives to prevent physical damage to the drives while in transit, and features lockable front door access for added data security. To ensure a cool operating environment, the SAT3510BU2E trayless SATA HDD enclosure provides a built-in 40mm fan that re-distributes the heat build-up generated as a result of typical hard drive operation - which is especially important for large volume storage (750GB, 1TB hard drives), and faster “spinning"" drives (i.e 7200 RPM), as it can help optimize drive operability and in turn preserve stored data ...