How do you save all emails in Microsoft Outlook?

A personal folder, also known as Outlook data file in the 2003 version or .pst, is a media used for storing emails created in Outlook. It compresses your emails similar to a zip file allowing you to save hundreds of emails along with their attachments. An archive folder is similar to a personal folder in that they both use .pst to store and compress emails. Archive, however, can be setup automatically to save emails that are older than a specific date. And, the default location for archived folders are on your hard drive. You can save emails that may take up too much space in your inbox. Or, save important emails from your colleagues, family members, friends and professors that you just don't want to delete. You could also use this to store a copy of your emails for use after you graduate.