1. Open your Outlook
2. Choose File > Options > Advanced > Export
3. Choose ‘Export to File’
4. Choose ‘Outlook Data File.pst’
5. Select the Whole Mailbox which is the very top icon and click Finish.
6. If a box appears asking for a password, just leave blank and click OK.
7. Save the file to your computer – Call it something memorable and store in a folder you can retrieve easily if required.
Its a good idea to perform this routine at least once a month so you can retrieve your files should anything untoward happen.
This step by step tutorial is also featured on your YouTube channel via the link below: