StarTech.com USB3S2ESATA Converter Cable 90cm USB 3.0 to eSATA 1x USB 3.0 A Male Plug 1x eSATA (Personal Computers)
Perfectly fulfills its function with an external hard drive enclosure with eSATA and USB 2, but a PC with USB socket 3. The flow rates are consistent with what is stated. Update May 2015: unfortunately, eSATA card proved too fragile and connectors ha