I have spent money on numerous different backup plugins over the years and when I found this free plugin I threw them all in the virtual garbage and never looked back. Install this free plugin, follow their simple steps to link it to your DropBox account, configure when and what you want backed up and it will do the rest automatically, creating backups of your website and depositing them in your WordPress account so should anything happen to your webserver you have automatic offsite backups. Wordpress Backup to Dropbox definitely provides good safety net.