Outlook is part of your daily routine. You use it to send email messages, to set up calendar events, and to create tasks and other items. But do you wonder how and where all those items are stored? They're usually archived automatically and saved in an Outlook Data File (.pst). And if you use Outlook 2010, Outlook 2013, or Outlook 2016, you can open and close Outlook Data File (.pst) files and manage how and where items are archived.
Open an Outlook Data File (.pst)
Open Outlook, and on the File tab, choose Open & Export > Open Outlook Data File.
Note: Depending on how Outlook is set up, it's likely the folder where the .pst file is stored will open automatically. If it doesn't, browse to the file's location. If you're not sure where your Outlook data file is located, see Locating the Outlook data files.
Choose the Outlook Data File (.pst), and then choose Open.
In the outlook data file folder—typically at the bottom of your Folder pane—choose the folder you want to open.
Remove (close) an Outlook Data File (.pst)
You can remove an Outlook data file from the Folder pane by closing the file. This does not, however, remove the file from your computer.
In the Folder pane, right-click outlook data file, and then choose Close "Outlook Data File".
More about Outlook data files
For more information about Outlook data files, see the following topics: