Pst-files, unless you are using an Exchange or Hotmail account, Outlook cannot live without them. All your data is stored in the pst-file and properly handling it is crucial to Outlook’s functioning.
There are many common questions about pst-files ranging from where it is located, how to move it and regaining access to pst-files to previously created pst-files.
The updated FAQ contains answers to these common questions but also contains more advanced information and side-notes with links for further reading and “secrets”.