Connect 2 SATA External Hard Drives to Your Computer’s USB Port for Extra StorageWhen the hard drive on your laptop is not large enough to hold all your photos, videos, music and documents, U339-E02 is the solution. This dependable docking station allows you to connect two SATA HDD or SSD drives to any device with a USB port, including MacBooks, Ultrabooks and Chromebooks. It supports 2.5-inch SATA III, II and I drives up to 2 TB, 3.5-inch drives up to 14 TB, and will support higher capacities as they become available.Transfers Data at Fast USB 3.0 Speeds with UASP SupportThis dock supports USB 3.0 data transfer rates up to 5 Gbps, which is 10 times the speed of USB 2.0, to give you more data storage, retrieval and backup capacity. It reads data up to 70 percent faster and writes up to 40 percent faster when connected to a UASP-enabled host controller. The U339-E02 is backward compatible with previous USB generations, allowing you to use it with older equipment.Clears the Content of 2 SATA Drives at the Same TimeAn Offline Erase function reformats two SATA hard drives simultaneously at the touch of a button. A red LED blinks to indicate the Erase function is being performed. Four blue LEDs indicate progress, letting you know at a glance when the disks are completely erased. Note: The Erase function will not work if the U339-E02 is connected to a computer or any other source via USB cable.Just Plug and Play for Immediate Use Right Out of the PackageNo software or drivers are required. The U339-E02 is compatible with all USB-enabled operating systems, including Windows, Mac and Linux. The included power supply with six-foot cord and NEMA 1-15P plug connects to a convenient wall outlet, PDU or UPS system.