Open Outlook and go to the option File from the above left and click on open.
Click on Import option.
Import and Export window will pop up on the screen. Select “Export to a file” option.
Click Next to move further.
Select Outlook Data File (.pst) and click next.
Select Personal Folder and check the sub folder option.
Select the folder where you would like to keep the backup, by clicking on the browse button and selecting a location where you would like to store this backup file. It is a good practice to change the name from just backup to backup_month date so that you are aware of this backup set.
