How To Backup outlook emails ?

"If you’re using Microsoft Outlook, the easiest way is to export your emails to a PST file. Just go to File > Open & Export > Import/Export, then choose ‘Export to a file’ and select Outlook Data File (.pst). After that, pick the folders you want to back up and save it to your system. I’ve used this method a few times and it works well for keeping a full backup of emails."