The C:\Users\(user name)\Pictures\Saved Pictures (%UserProfile%\Pictures\Saved Pictures) folder is created by the Photos app.
The Saved Pictures folder is the default location for apps to save pictures. For example, images automatically imported from a connected camera or memory card by the Photos app.
If you like, you can change the default location of this Saved Pictures folder to where you want instead.
This tutorial will show you how to change or restore the default location of the Saved Pictures folder for your account in Windows 10.