Here's how to export your emails to a PST file in Outlook 2010

1. In the upper left corner, choose the option "File".
   If you do not have the option "File", please check which version of Outlook you are using.
   
   
   
   
2. Choose "Options".
   
   
   
   
3. Choose "Advanced" on the left side of the "Options" popup.
   
   
   
   
4. Choose"Export" under the "Export" headline.
   
   
   
   
5. Select "Export to a file" and click "Next".
   
   
   
6. Click "Outlook data file (.pst)" and click "Next".
   
   
   
7. Select the name of the email address that you would like to export.
   You can only export one email address at a time. Make sure that the "Include subfolders" box is ticked. This will make sure that all the data will be exported: agenda, contact persons and inbox. Choose "Next".
   
   
   
   
8. Click "Browse" to select where you save your .pst file. Click "OK" to continue.
   NOTICE:  If you have use the export function before, the last folderlocation and filename are shown. In case you want to create a new file instead of using the already existing file, change the filename.
   
   
9. Once you start exporting a file to .pst, make sure to choose what must happen to the already existing files under "Options".
   
   
10. Choose "Finish".