Windows Explorer (AKA File Explorer) offers a Navigation Bar on the left to help you select folders. Mary Hall asked how to customize it.
The Explorer Navigation Bar provides a map to the drives and folders on or accessible to your computer. Two of the sections, Favorites and Libraries, are easily configurable. The other sections are not configurable for a good reason. If you want to add a drive to the Navigation Bar, you need to add that drive from your PC (which adds it to the Navigation Bar automatically).
A quick note on the name: Microsoft has called its file manager Windows Explorer since Windows 95. With Windows 8, they renamed it File Explorer—a good change in my opinion. For this article, I’ll just call it Explorer.