https://qooah.com/2015/06/26/usb-%e6%b0%b4%e5%86%b7%e5%a2%8a-%e4%b8%80%e5%80%8b%e6%b0%b4%e6%a8%bd%e4%b8%80%e5%80%8busb%e5%b0%b1%e7%94%a8%e5%be%97/