Do you have a USB drive on your phone? I could never get my phone to mount on my laptop, until i figured out I needed a USB driver on my android phone. I use USB driver for Android, by Mobile Manager. When I plug my phone in I pull down from the top of the screen and it says "USB for charging" and "Touch for more options" if i touch I get
Charging only (default)
Transfer files (MTP)
Transfer Photos ( (PTP)
MIDI
When I chose any one of those except charging only, my phone mounts using the MTP program on my computer and my MOTO 3 DCIM file mounts. From there I can drag and drop files from or to the phone and delete files, and access the micro USB drive.
I feel your pain. I tried numerous tutorials and NOT ONE mentioned your phone needs a USB driver. Hope this helps you. Here is the driver I am using ON MY PHONE.
https://play.google.com/store/apps/details?id=com.adbdriver.android&hl=en
