How to block mobile connections on Windows 8.1 Single Lang

Hello,
I would like to block mobiles from being connected to my PC and copy files.
How do I achieve this?

I have disabled pen drives but the issue persists with mobiles.
Enable or Disable Write Access on USB Ports - Prevent Copying Files

Mobiles seem to be using a different connection.

Oh, I forgot to mention it doesn't not have Group Policy Editor because it is Single Language.

Bump! Please help.
I need this urgently.