Files is a File Explorer alternative with handy features such as Omnibar, designed to streamline your file navigation ...

Open Gallery in File Explorer, then click the Collection menu in the actions bar. Click on Manage collection to see which folders are being tracked for Gallery and the option to add or remove folders.

This will cause Windows to open the Folder Options dialog box. If you look at Figure 1, you can see that at the very top of the dialog box, there is an Open File Explorer to drop down box.