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The Default path for All Microsoft Office Outlook .pst file location is the User data(Your account name)/Local Settings/Application Data/Microsoft/Outlook/ this is where the .pst files are stored by default!!! this goes for All Windows OS! Tuesday, June 05, 2012 12:18 PM.
You can create a new pst file or use the default archive.pst which Outlook will create in the default location for pst files. (In Outlook 2010, this is in your My Document\Outlook Files folder.) If you permanently delete old items, archived items will be deleted and you will not be able to recover them.