1. First go to "This computer" and open "File Explorer";
2. Click "View" in the menu bar at the top of the window, as shown in the following image;
3. Then we select "Show Library" in the Drop-down menu in the Navigation Pane, as shown in the following figure;
In the left pane, the Library and related folder directories are displayed, and you can find your documents, music, pictures, and video libraries by clicking the arrow next to the library file, which is the Win8.1 library feature.