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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.
This is always in the user's profile. So in XP it will start with C:\Documents and Settings\Username\ and with Win7 it will start with C:\Users\Username. You can find the current location of the PST in Outlook 2010 by: Start Outlook. 2010. Click the File tab in the Ribbon, and then click the Info tab on the menu.