Overview Tripp Lites U339-002 USB 3.0 SuperSpeed to Dual SATA External Hard Drive Docking Station allows two SATA 2.5in or 3.5in hard drives (HDD) or solid state drives (SSD) to be connected simultaneously to a computer through USB. Supports 3.5" drives up to 4TB. Off-line cloning allows hard drive duplication without being connected to a computer. Utilizing SuperSpeed USB 3.0, this docking station provides data transfer rates of up to 5 Gbps, but is also backward compatible with USB 2.0 systems (data transfer rates up to 480 Mbps).