This guide shows you how to make a proper Outlook 2007 email archive backup.
- Close Outlook and wait 10 seconds
 - Run: C:\Program Files\Microsoft Office\Office12\scanpst.exe
 - Open the file in “C:\Users\<username>\AppData\Local\Microsoft\Outlook”
 - In case you have multiple files in the directory do step 2 and 3 several times
 - Copy the files from “C:\Users\<username>\AppData\Local\Microsoft\Outlook” to the backup location
 
To open the backups, just open the .pst files you copied earlier.