Sam

Suppose that your team has just posted their latest quarterly reports to various document libraries on the team site, and you want to back up the site at this critical juncture. Or suppose that your team has been moved to a different group in your organization, so you need to move your team site to another server. You can use Microsoft Office SharePoint Designer 2007 to create a backup copy of a site or subsite, and then re-create that site on the same server or on another server.
When you back up and restore a site, you actually perform three separate operations: First, you back up the site to a single file. Then you create a new empty site as a destination. Finally, you restore the backup site to that destination. more..