Configure each of the three USB OTG functions (USB Ethernet, USB serial communication, and USB storage) individually.
Ethernet, Serial, and Storage enabled by OTG – configure each function individually
What you can do when you run PL-R5 as a USB device
Ethernet, Serial, Storage realized with OTG
USB OTG (On-The-Go) is the ability for a single USB port to become both a Host and a Device.