I know that the original user question is solved, but I wanted to offer this tip for a related problem. I updated the Android OS on my LG G4 phone and it changed the USB settings on my phone to allow only charging via USB. (I was using the same USB cable that came with the phone.) The menu option to change the setting doesn't seem to exist in a path from Settings. ("USB PC Connection" is gone from Settings>Storage & USB, and there is no menu option.) However, once you plug in the phone, you will get a notification that the USB cable is connected. (Look on your phone's display or in the icon displays at the top left. The USB icon should be displayed.) You can pull down and click on this to get directly to the Settings page. You can then change the option from "Charge Phone" to "Media sync (MTP)." If the phone later prompts you to allow the phone to sync your files or allow the PC to access your files, you need to allow this.