We're going to see how to hide the folder in this article.

    You need to change some settings before doing this.

1. Open the File Manager ( Files, File Explorer ) app .
2. Next go to Settings.
   
3. Turn off Show hidden files and Show Hidden Media files also.
4. Next, go to Internal or External Data Storage.
5. Choose a folder that you want to Hide.
6. Next, select the Rename option.
7. Type a dot before the name of the folder. Click the save ( ok ) button. 
8. Now folder hided.

Info:

    If you want to see a hidden folder, in settings enable Show Hidden Files and Show Hidden Media