Outlook Data Files (.pst), or Personal Storage Tables files, contain Outlook user messages and other Outlook items, such as contacts, appointments, tasks, notes, and journal entries.

If your online mailbox is nearly full, you can export some items to an Outlook Data File (.pst). You can also use these files to create archives, project files, or backups from any Outlook account.

Outlook Data File (.pst) support in new Outlook provides access to emails stored in a .pst file. You can browse, manage, and move emails (drag and drop) between .pst files and mailboxes.

You might have stored Outlook items in an Outlook Data File (.pst) that you created in classic Outlook. If you want to open or close a .pst file, you now can do that in a few simple steps from …

.Pst files are created when you export or back up email, contacts, and calendar to an Outlook .pst file. Outlook makes a copy of your email to the .pst file. See Fix problems importing an Outlook …

If you cannot open your Outlook data file or suspect that the file is damaged, use the Inbox Repair tool (scanpst.exe) to repair errors in the file.

If you want to back up the message folders locally (in addition to keeping them on the server), you can automatically move or delete older items with AutoArchive or export the items to a .pst file …

Export from Outlook app Export contacts from Outlook to a CSV file or Excel Export email, contacts, and calendar to a PST file

Jan 13, 2026 · After Windows updates on January 13, 2026 users with Outlook POP account profiles and profiles with PST files report that Outlook hangs and does not exit properly.

Your Outlook mailbox is only so big, and it’s a good bet that you won’t stop getting email anytime soon. To keep it from filling up, you can move old items you want to keep to an archive, a …