I have just come across a similar set of instances in my wifi log this morning also. These two I find most curious, given I DON'T have any USBs connected/inserted currently:
State:/Network/Interface/en0/AirPort/SmartCCADesenseUSBPresence and State:/Network/Interface/en0/AirPort/SmartCCADesenseSupported
My online research a near-fruitless exercise.
Are you using a USB on your router or any other device in your network?
Only suggestion might be to take your USB (if the contents is important) to a computer engineer or use some data recovery software?.
