Because PST files are essentially databases, they are prone to corruption if they grow too large or if Outlook closes improperly (e.g., power outage).
Outlook stores PST files in hidden system folders by default. The location has shifted over the years as Windows security architecture evolved. Below are the default paths based on your Outlook and Windows version. outlook pst location
Before diving into the location, it is important to understand what a PST file actually is. Because PST files are essentially databases, they are
OR