Step 1 : Show the hidden files
Step 2 : Follow the path to find your outlook folder
Then copy the folder in the new PC to use you PST file.
Step 3 : Open the outlook in the new PC and go the the tab File
Step 4 : You have 2 choices “Open” / “Import”
Open : You will open the old PST file as an archive => 2 PST files, first one is created by default in your new PC, second one used as an archive (but you can merge it whenever you want)
Import : you will merge your old PST file with the new PST file created in your new PC => 1 PST file.
Select your PST file to merge it