John wants to save SMS text messages. Leo says that in his Android device there is a built-in backup for text messages in the settings. But there's also a ton of apps out there including SMS Backup and Restore. SMS Android Plus. Check out the article here - https://www.androidpolice.com/2019/08/21/backup-sms-text-messages-android/.
You can also backup text messages to a Gmail account using SMS Backup. Check it out here - https://www.howtogeek.com/112852/how-to-backup-your-text-messages-to-your-gmail-account/