Windows comes with four libraries: Documents, Music, Pictures (for pictures and home videos), and Videos (for movies and TV shows).
When your files are organized into those libraries, they’ll show up automatically in the Photos, Music, and Video apps. Plus you'll be able to see them in one place whenever you open that library.
If you already keep your media files in certain folders on your PC, don't worry—there's no need to move them. Just add the folders to a library.
If you import a lot of photos, videos, and music, you can choose what happens when you connect a phone or camera or insert a CD. For example, you can use the Photos app to import pictures and videos but use File Explorer to import your music.