USB Debugging Not Working And Not Showing Problem Solve - YouTube
rooting - USB Debugging: PC doesn't recognize that my Moto E (2nd Gen)(Upgraded to Marshmallow) in on debugging mode - Android Enthusiasts Stack Exchange
How to Enable USB Debugging when Phone is Locked or Broken
Is it safe to enable 'USB debugging mode' on my Android? I needed to enable it in order for the Android file transfer to work. - Quora