It just dawned on me that the second email account I created (after buying an Phone) to keep my email synced had created its own pst file and I haven't been backing it up other than it being part of regular imaging.

However, I do not get the reason for the different dates and names for the same file? I could use a *.pst for backup but then I'd be collecting potentially unncessary files and using up storage necessarily. Since the first part of the filename is changing along with the part preceding the '.' I don't see a backup filespec that would work to automatically pick just the latest (presuming 00000009 will not be the last)?

C:\Users\Mark\AppData\Local\Microsoft\Outlook\Outl g2.mark@gmail.com-00000006.pst--4/29/12

C:\Users\Mark\AppData\Local\Microsoft\Outlook\Outl g2.mark@gmail.com-0000000a.pst--6/5/12

C:\Users\Mark\AppData\Local\Microsoft\Outlook\Outl mark@greenbergcm.com-00000009.pst--12/16/12