Glossary

Personal Folders File (. PST)

Personal Folders File (. PST)

A .PST (Personal Storage Table) file is used by Microsoft Outlook to store copies of emails, calendar events, contacts, and other mailbox content locally on a device. Think of it as a personal archive that lives outside the mail server – handy when you’re running low on server storage or want to back up important messages.  

By creating a .PST file, users can:  

  • Free up space in their Exchange mailbox  
  • Organize emails into custom folders  
  • Search past messages without relying on an internet connection  
  • Combine content from multiple inboxes (or keep things neatly separated)  

While .PST files offer flexibility and control, they can also be a bit of a wildcard; if not regularly backed up, they’re prone to corruption or loss. Proceed with caution, and don’t forget that modern alternatives like cloud-based archiving often offer more security and less drama. 

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