Backup and Migrate

The Backup and Migrate module will save your life. Seriously! It does rolling incremental backups daily database for the last 60 days with the option to do special on-demand backups manually

Warning: This module only backs up the database. In order for a backup to be considered "complete" you must then back up the actual physical files on the database with an FTP program. I suggest using "Transmit" for OSX or FileZilla for windows.  Once you download or sync the entire Drupal folder using FTP you should have a copy of all your database backups done with the "Backup and Migrate" tool since they are simply stored as files at the location: /drupal/sites/default/files/backup_migrate Backups should be done before:

• Upgrading drupal
• Upgrading or adding modules
• Any significant change to the way the site works
• Modification of views

When in doubt, backup first. It doesn't cost anything and it will give you peace of mind.