Your Outlook Data File is composed of a file header, located at the beginning of the document, and the actual data that makes up your personal folders. Contained in the header is information about ...

What is Outlook PST file? Outlook PST file is a data file, which stores all the messages and other information about your email account on your computer.

When Outlook continually looks for data file errors, that's because Outlook believes there is a problem. However, to repair any errors, the data file -- more specifically the Outlook .pst file -- ...

What is a PST File? The PST File of Microsoft Outlook is a useful application that allows the storage of Outlook emails for both received and sent emails in the hard drive of the computer.

The OST (Microsoft Exchange offline) file that is named as the email address you use with your Outlook account is the file containing contacts and other Outlook data.

Once you’ve installed Outlook onto the new PC, you’ll have a fresh, clean, and empty .pst file. You’ll have to import data from the old file to the new one.

But when I try to open Outlook the next time, I get a pop-up that says this: “MS Office Outlook — The data file ‘Personal Folders’ was not closed properly.

For a more up-to-date file, Outlook automatically stores your emails and other settings in a PST file in the Documents > Outlook Files folder under your username.

How do I back up my Outlook email, contact, calendar and other data to an archive file that I can save or transfer to another computer?

That's why it makes sense to move copies of your important Outlook files to folders that live outside the Office system.