Finder doesn’t see files on Android devices from MacBook Pro USB commections
You need an app for OS X/macOS to transfer files from an Android phone to your Mac.

Try Android File Transfer from Google.

Also, a suggestion from another forum is:


  Try disabling Settings -&gt; Applications -&gt; Development -&gt; USB
  debugging in conjunction with setting Settings -&gt; Applications -&gt;
  USB settings to Mass storage.