1. From the File menu bar, choose Data File Management..



2. Click on Data Files > Add…



3. Select Outlook data file (.pst) and click OK.



4. Next, choose the file name and folder location which you wish to save your Personal Folder. Click OK.



The new Personal Folder will be added into the Data Files.

5. Your Personal Folder is now created and it will appear in your folder list.

Want to know more about personal folders? here.