To export Gmail emails to PST files, you should use eSoftTools Gmail Backup software, which will help you to easily export Gmail emails to PST. This software works very well in exporting files. With the help of this software, you can also shift your emails from Gmail to any other email platform like Office365, Yahoo, Outlook.com, & IMAP account. This software works on all Windows versions and you get a free demo in which you can download 20 emails from your mail folder.