A classic question whenever you’re trying to do something with the internals of Outlook. Microsoft has hidden the file well.
Here’s how you find it nevertheless:
- In the Outlook folder tree right-click the topmost item (“Personal Folders”)
- Click on “Properties”
- Click on “Advanced”
- At “File” you can see the path and file name of your pst file.
The best idea here is to copy the path and paste it into the Windows explorer address bar. (With the Windows default settings you can’t reach this folder by clicking on the folder icons because some of them are hidden.)