9528U3 series HDD enclosure with 2 independent 4TB e-SATA HDD enclosure supporting all 3.5" hard disk devices more convenient and powerful for you to store more information at the same time. High speed and creative security design ensure you with high efficiency and long time service. 9528U3 keeps the creative design with window and the tool-free design only with three steps can you change 2 different hard disks at the same time. The high quality of good skills and top workmanship ensured you with the great storage more convenient and fast for you. What's more everyone of the 2 enclosures be equipped with lock for you to ensure the security of your information or protect it from the mistake operation.