The S2510U33USM USM enclosure enables you to insert a 2.5” SATA HDD/SSD into any USM host interface including the Star Tech.com S2510U33RUSM 5.25" USM bay, & Seagate Go Flex devices. To ensure you get the most from your SATA III drive, the enclosure supports transfer speeds up to 6.0 Gbps. USM (Universal Storage Module) is a portable drive standard that interfaces with SATA & enables you to hot-swap drives between multiple host devices, such as PCs, notebooks, DVRs & many others. Using the included USM to USB (Universal Serial Bus) 3.0 adapter the enclosure can also be connected externally to non-USM host devices via USB (Universal Serial Bus). Plus, with support for UASP, the enclosure performs up to 70% faster than conventional USB (Universal Serial Bus) when paired with a UASP-enabled host controller to utilize the full potential of your SATA III hard drives. See our UASP testing results below for further details.