Unable to transfer pictures and videos from phone to PC

Unable to transfer pictures and videos from phone to PC

Have a Nexus 5x with Android 7.1.1 operating system. Once attached to PC I can see the connection but screen indicates that there are no pictures or videos found. I have researched on the web but have found nothing that works. I can find nowhere on the phone anything that indicates a USB icon or anywhere to switch a default of Media Device to Camera. Am very frustrated with this O/S (phone) and would like someone to give me the definitive answer to this problem. Thanks.