The most efficient tool on the market is the eSoftTools Outlook PST Recovery Program. It instantly imports Outlook PST files into Gmail. Outlook PST Recovery Software reveals the converting process with some mouse clicks. Using this program, PST files can be divided into many smaller files. The free trial version is free to all users. In the free trial version, you can convert up to 25 emails per folder.
Visit here:- Import Outlook PST files into Gmail