Windows 10’s Fall Creators Update adds a “3D Objects” folder to This PC. It even appears in File Explorer’s sidebar. Microsoft is clearly trying to promote Paint 3D and Windows 10’s other new 3D features, but you can hide the folder if you don’t like it—you just need to dig into the registry.
This won’t delete the folder from your PC. The 3D Objects folder and its contents will still be accessible at
C:/Users/NAME/3D Objects , where
NAME is the name of your Windows user account. This merely removes it from File Explorer’s sidebar.