When operating a WordPress site, you may encounter situations where a single update causes the screen to break or prevents you from logging in. In such cases, the only safeguard to revert the changes is BackupThere is no need to overthink backups; you can simply start by getting into the habit of taking care of both files and databases together.
1. Both files and databases are required for the backup.
Posts, Pages, Comments, and Settings databaseIt is saved there, and themes, plugins, and uploaded photos fileIt is saved as such. If you back up only one of them, the site will not be intact even after restoration. When using a backup tool, please make sure to select both 'Include files' and 'Include database'.
2. Create your first backup with the free UpdraftPlus plugin
A free tool often recommended to beginners UpdraftPlusSearch for UpdraftPlus in Plugins → Add New on the Admin screen, install and activate it, and then click 'Backup Now' on the Backup/Restore tab of the UpdraftPlus menu. When the window appears, check both Files and Databases and start the backup. Once the backup is complete, the process is finished by verifying that the new backup appears in the existing backup list along with the date.
3. Please keep backup files in a location different from the site.
If you keep backups only on the same server, the backups may be lost if the server fails. In the settings, like Google Drive remote repositoryIf you connect it, backups are automatically stored elsewhere. For a site where you write frequently, it is recommended to set the automatic backup frequency to daily for the database and weekly for files, and also to set the number of backups to keep to prevent old backups from accumulating indefinitely.
4. Perform a manual backup one more time before the update
Before updating the WordPress base system, themes, or plugins, create a manual backup at least once, regardless of your automatic backup schedule. If you save a backup with an easy-to-recognize name that captures the state just before the update, you won't get confused about which point to revert to if a problem arises. Furthermore, when it comes to backups, whether they can be restored is more important than simply creating them. If you practice restoring at least once in a test environment when you have the time, it will significantly reduce panic in the event of an actual accident.
※ This article provides general information for educational purposes. Since some hosting companies offer their own backups, a dual structure involving both hosting backups and plugin backups is the safest option.
source: 'How to Back Up Your WordPress Site: The Ultimate Guide' (dev.to) · 'WordPress Backup Strategy: Complete Guide' (AttoWP)
Reference link:
https://dev.to/minima_desk_cd9b151c4e2fb/how-to-back-up-your-wordpress-site-the-ultimate-guide-445
https://attowp.com/security-performance/backup-recovery/wordpress-backup-strategy-guide/ | 
