No folders or files appear below Windows Explorer Moto G3

[AC Question]

When I first connected my new Moto G3 and chose Transfer files (MTP), I saw many folders and files beneath the device icon. Now when I click on this icon nothing appears below the icon. I'm using Windows 7. Where did everything go???

 

[B. Diddy]

Welcome to Android Central! Is the phone's screen unlocked while it's connected to the computer?