PST stands for Personal Storage Table (PST). It is a file format for storing data locally on your computer instead of online email servers. You can only manipulate the data locally.

With email storage no longer an issue, the need for Personal Storage Tables (PSTs) no longer exists. Read this Complete Guide to Eradicating PST Files to find out how you can be PST free. Learn more.

On the other hand, PST (Personal Storage Table file) files store emails, contacts, calendar items, and other Outlook data locally.

Personal Storage Table or PST is a popular and most commonly used mailbox data file format for storing, backing up, and migrating mail items to and from Microsoft Outlook.

A personal storage table, or PST, is a proprietary file format built by Microsoft to store copies of messages, calendar events and other items within the company’s software platforms.