You can backup WordPress by using phpMyAdmin to backup the Maria database that you created for WordPress. From here, follow the WordPress tutorial for backing up your database. Another option is the paid backup service through Jetpack offered by the WordPress development team, prices as low as $3.50 per site per month and includes many other great features. (Our Managed WordPress plans include Jetpack Premium for free.) There are also many free WordPress plugins that can allow you to backup your site and database as well, including WP DB Manager, and UpdraftPlus.
Note: Please keep an eye on your disk space usage. Most plugins have options to send backups to a remote location like Dropbox; be sure to double check that your backup plugin of choice is setup to remove older backups. For UpdraftPlus go to UpdraftPlus ‘Settings’ tab > ‘Show expert settings’ > select ‘Delete local backup’ and make sure to click the ‘Save Changes’ after. This will tell UpdraftPlus to automatically delete the backups on your server once the backups are successfully sent to your remote storage.