Follow the steps to understand the Gmail Backup Software
Run Gmail Email Migration tool in your Windows system.
Select Advance (Use Batch Mode) option for backup multiple Gmail accounts at once.
Enter login details of Gmail account in the interface.
Choose the required email folders from the list.
Choose the required file saving option from the list.
Migrate Emails from Gmail to Outlook Process Started.
Backup Process of Gmail account is successfully completed within few minutes.