This video shows booting Ubuntu 16.04 in less than 10 seconds from a SSD SATA drive connected through a USB 3.1 to SATA adapter that supports the TRIM command. For more information on TRIM support via USB, also for Windows 10, visit http://salutepc.altervista.org/ssd-on-usb-3-0-3-1-with-trim-support-windows-linux.html

source