Add a USB (Universal Serial Bus) 3.0 port connection that inserts flush into a laptop Express Card slot. The ECUSB3S11 Flush Mount 1-Port USB (Universal Serial Bus) 3.0 Express Card lets you add a single USB (Universal Serial Bus) 3.0 port connection to your laptop through an Express Card slot. The USB (Universal Serial Bus) 3.0 adapter uses a unique form factor design that allows it to sit fully in a standard 34mm Express Card slot without sticking out. The port sits virtually flush with the sides of the laptop, enabling you to leave the card installed even while on the move, without fear of damage to the card or slot. Enhanced with UASP support (USB Attached SCSI Protocol), this USB (Universal Serial Bus) 3.0 controller performs up to 70% faster than conventional USB (Universal Serial Bus) 3.0 when paired with a UASP supported enclosure (Note: UASP requires a compatible operating system). Using a more efficient protocol than the traditional USB (Universal Serial Bus) BOT (Bulk-Only Transport), UASP technology optimizes transfers by allowing multiple commands to be processed simultaneously, significantly increasing transfer speeds for less wait time on data transfers. The USB (Universal Serial Bus) 3.0 Express Card adapter supports data transfer rates up to 5 Gbps, & is still backward compatible with USB (Universal Serial Bus) 2.0 at up to 480 Mbps, or USB (Universal Serial Bus) 1.1/1.0 at up to 12/1.5 Mbps respectively. UASP is supported in Windows 8, Server 2012 & Linux kernel 2.6.3 or later. In testing UASP performed with up to a 70% faster read / 40% faster write speed over traditional USB (Universal Serial Bus) 3.0 at peak performance. At the same peak in testing, UASP also showed up to an 80% reduction in required processor resources. Test results were obtained using an Intel Ivy Bridge system, Star Tech.com add-on USB (Universal Serial Bus) 3.0 cards, a UASP-enabled Star Tech.com enclosure, & a SATA III solid state drive.