Byte Size Tips: How to Bring Libraries Back on Windows 8.1 and 10’s File Explorer

Microsoft began hiding libraries from the File Explorer’s navigation pane on Windows 8.1, and they’re still hidden by default on Windows 10. This is weird, because libraries are still used by Windows. The Photos app uses your Pictures library, the Groove Music app uses your Music library, and the media sharing server shares the contents of your media libraries, for example.

via: howtogeek.com