Check step by step procedure to create Gmail Backup

Step 1: Firstly you need to enable to IMAP option in Gmail Account setting.

Gmail IMAP Setting

Step 2: Now Turn on "Access for less secure apps". You can go with this URL:

Less Secure Apps

Step 3: Run Gmail Backup Tool and enter your Gmail credentails.

Gmail Backup Tool

Step 4: Check all folders/ custom folders and number of messages and hit "Next" button to go next steps.

Check Preview

Step 5: Now, choose required export option and browse "Output Directory". After that, click on "Process now" button to finish the backup process.

Export Backup