1. In Outlook, click File | Data File Management

2. Click the Add button

3. Click Ok

4. Click My Computer button on the left.
5. Path out to your M:\ or Y:\ drive, where your personal folders are located.
6. Rename the Personal Files(1).pst to something you would like to call the file. For Example, here I renamed it to File_Name.pst

7. Click Ok
8. Change the Name: area to what you would like Outlook to call the pst file in your Outlook folders list.
9. Click No Encryption.
10. Leave Password blank.
11. Click Ok

12. You will now see the newly created pst in your Data Files display.
13. Click Close unless you want to Add more pst’s.

14. You will now see your new pst file listed in the Folders area of Outlook.

Messages and Folders can now be dragged and dropped into the new pst file.
These pst’s will work just like your inbox, where you can create folders and subfolders for storage of your messages.