This article helps you to do this, hide files and folders without installing any app on your phone. Hide files and folders with some easy steps which can be performed easily without spending so much time.
Step for how to hide files and folders without using any app on the android phone.
Open file manager goes to internal or external storage.
Press on three dotted line then Creates a folder in sd card name like teletrickmania (you can choose the name as you want).
Rename the folder by adding prefix ‘ . ’ like “.teletrickmania” and press ok.
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Go to file manager then sd card.
Click on three dotted line and go to setting.
Check hidden files or press on show hidden files.