Ok, I had my Galaxy Note 4 updated recently.
As the result, now every time I connect to any PC, I have "this folder is empty" message.
BEFORE update, same PCs saw all the folders on my phone just fine. Now I can not transfer files, pics, etc. I take pics of my patients and store them in dedicated folders and as I do mobile service, I MUST have transfer enabled.
What do we do?
Phone is showing in File explorer as Samsung phone. Same goes for W7 or for W10, don't matter. Like I said, all worked fine before update.
With the Marshmallow update, the default USB mode is charge only. Pull down the notification shade, tap where it says USB Charging, and change it to File Transfer.