This article explains how to install the Team Win Recovery Project (TWRP) custom recovery tool on your Android device. Instructions apply to most smartphones and tablets running Android 7.0 (Nougat) or later.
How to Install TWRP Custom Recovery on Any Android Phone (No Root)
This method is universal and works for most Android devices.
Install the official TWRP app from the Google Play Store.
Open the app and accept the terms and conditions.