The first essential thing you need to know before anything else is where your PC saves all the Outlook data useful to you. Although it depends on your version of Outlook, all versions follow one out of two basic patterns in terms of saving your emails, contacts, and data.
Basically, Outlook uses a particular file format with the extension .pst for saving all your emails, contacts, calendars, and other data in your personal folders. This means that every personal folder you have in Outlook will have a different file ending in .pst for saving all the data from that folder.
Now, to find these .pst or 'Personal Folder' files, you have to do the following:
For Outlook 2003 and later versions
- First of all, go to "File" menu, and click "Data File Management".

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- In the next screen, you will find your data folder names and their filenames in front of them. All these folders contain vital Outlook data including your emails, contacts, calendars, and other data. Out of these, just single click to highlight the folder which contains the data that you want to save. Usually, its name is "Personal Folders".

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