A:Answer Hello Susan,
Can you give more details of why you are looking for the USB? Is it to view video? If you are using the indoor hard wired cameras that get power from the ethernet port.
The Hub as I understand it connects to your router. The USB is for local storage. I don't have Arlo so I am just guessing at the moment. I have ADT/Alarm.com. I can connect my hub to a monitor via HDMI. The video can be stored in the cloud or via USB storage. Or both.
Long way of saying, without knowing what device and why you need the USB it is hard to help. That being said, these extenders can be used for the wireless cameras to connect via WiFi however, no USB is on the extenders.
Happy to circle back to help,
Mr. Veggie