How to hide files or folders in android without using any applications

steps:-

1) To hide single file(photo,video) change the extension of the file
(ex:-from .jpg/.jpeg/.mp4 to .hai/.any/).

2)Now click on that file it will not open.

3)To open that file change the extension to orginal.

4)To hide the folder goto any filemanager and create a new folder containing a .(dot) at the start of the folder name.(ex:- .hai).

5)To see this folder goto filemanager and select show hidden files/folders in the option.