How to set automatic deletion of old messages on my Samsung Galaxy S7 edge

Click each step to see the action. You can also click the picture or use the arrow keys.

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This feature will automatically delete old messages once the limit is reached.
1. Touch Apps.
2. Touch Messages.
3. Touch the Menu icon.
4. Touch Settings.
5. Touch More settings.
6. Touch Delete old messages.
7. Automatic deletion of old messages has been set.