How to Enable USB Debugging on Android - Just a few clicks
android - Install App By USB [Install canceled by user] - Stack Overflow
Was ist USB-Debugging? Und wie aktiviere ich es? – Einfach erklärt
What Is USB Debugging on Android How to Enable It?
rooting - USB Debugging: PC doesn't recognize that my Moto E (2nd Gen)(Upgraded to Marshmallow) in on debugging mode - Android Enthusiasts Stack Exchange