IT Technical Interview Practice Test

The biggest practical advantage is portability. A PST file stores all Outlook data—emails, contacts, calendars, tasks—in a single local file. That makes it easy to copy, move to another computer or profile, and open in Outlook on a different machine or as part of a backup. It’s a straightforward way to migrate data or take a complete snapshot of your mailbox offline.

Real-time cloud synchronization relies on server-based storage like Exchange or Outlook.com, not on a local PST. While you can password-protect a PST, that doesn’t provide strong encryption, and its protection isn’t the same as modern encryption used by cloud services. And the file size is tied to the amount of data you store; there’s no inherent advantage that PSTs have for reducing disk usage compared to other formats.