Microsoft has been providing providing a easy to use Personal Folders Backup since the Outlook 2002 version. This application creates backup copies of your .PST files at regular intervals. The current version of the utility works with Outlook 2003 and Outlook 2002 and works on Windows 2000 SP3, Windows 98 SE, Windows ME and Windows XP. This utility can be downloaded from http://www.microsoft.com/downloads/details.aspx?displaylang=en&familyid=8B081F3A-B7D0-4B16-B8AF-5A6322F4FD01#QuickInfoContainer