Step 1. Choose File then Import and Export

Step 2. Choose Export to a file, choose Next

Step 3. Choose Personal Folder File (.pst), choose Next

Step 4. Choose the folder you want to Export and check Include subfolders. Choose Next

Step 5. Browse to where you want the .pst folder to be stored (if on your H: drive, browse to your H: drive)
Click OK when finished.
 

Step 6. Click Finish.

Follow Step 1 and Step 2 from above; choose Import from another program or file.

Choose Personal Folder File (.pst)
Follow Step 5 and Step 6 from above.