You will need to know the location of your .pst file.

  1. Within Outlook, choose File tab > Account Settings… > Account Settings…
  2. Within the Account Settings dialog box click the Data Files tab
  3. Click Add
  4. Browse to the location where you stored your .pst file
  5. Select your .pst file
  6. Click OK
  7. The folder will appear at the bottom of your Folder List
  8. Click the white arrow next to it to the folder to view the contents