I just upgraded to a LG Aristo. When I connect it to my desktop Windows 10, it recognizes "LG Aristo", but there is nothing showing- no folders, camera, pictures, nothing!
Your phone should display a message upon being plugged into the computer, and this message will prompt you to select a connection mode. One of the modes should be "File transfer" or "Media Transfer Protocol" or "MTP." This should enable your computer to read the contents of your phone's internal and Micro SD storage devices.
If it doesn't, then you may need to download LG Bridge to your computer.