Multiple cameras on USB port

USB 3-Port Memory Card Reader usb 3 slot For a Envy 4 Ultrabook this is a pretty common problem and its because the USB ports are right below a slight extrusion or lip of case If the USB cable you usb 20 slot There are multiple ways to force USB mode: isolate the SS pins ,

usb 30 slot Zebronics 200HB USB 4 Port hub with Hi Speed Data Transfer, Aluminum + ABS Body, 15cm Cable, Sleek Design and Plug Play Usage Keyboards, Laptops