Personal Storage Table (PST) and Offline Storage Table (OST) are two file formats used by Microsoft Outlook for storing user data. Both have unique characteristics and serve different purposes in email management and data storage.
PST, or Personal Storage Table, is a file format used by Microsoft Outlook to store copies of messages, calendar events, and other items. PST files are most commonly used for storing archived items and are a popular choice for data backup and transfer.
OST, or Offline Storage Table, is a file format used by Microsoft Exchange Server, as well as the Outlook and Office 365 suite. OST files are an offline cache of what is stored on the mail server, allowing access to mail data even when not connected to the internet.
|High (easily transferred)
|Low (tied to specific account)
|Offline Access, Synchronization
|Required for synchronization
|Up to 50GB
|Unlimited, but performance varies
Choosing between PST and OST depends on the user's specific needs. If the goal is to create backups or transfer data between different systems, PST is the better choice. For users who need to access their mailbox offline and synchronize with a mail server, OST is more suitable.