Akeeba Backup is a native 1.5 joomla component formally known as joomlapack is the best option for backing up your joomla website. In a nutshell, Akeeba Backup Core is an open-source backup component for the Joomla! CMS, quite a bit different than its competition. Its mission is simple: create a site backup that can be restored on any Joomla!-capable server.
