The best way to recover is by using the eSoftTools Outlook PST Recovery Program. It quickly imports PST files into Gmail from Outlook. With a few clicks user can restore Outlook PST into Gmail cloud. This tool allows you to separate PST files into a variety of smaller files. All users can use the free trial version. Up to 25 emails per folder can be converted into a free version.
Visit here:- Import PST Files into Gmail from Outlook