How to backup Gmail

Follow steps to backup your Gmail messages/mail:

Login to your Gmail account by visiting website http://www.gmail.com
Click on your username and then go to ‘Account’ section and click it. This will lead you to the next page regarding ‘Manage’ option.
Move to ‘Security Checkup’option page
End up your scrolling until you reach the ‘Account Tools’ option and then click on ‘Download Data’
This will open ‘Download Data’ page in which you will see many Google products lists. And this will provide you your active Google product backup option. Click only on those option which you want to backup.
This time we back up our Gmail so tick mark on ‘Yes’ box and Download Gmail.
Scroll down and click on the Next button and there will be a pop up asking you about downloading the selected Zip or not? And continue with Yes option.
Now your selected items will be converted to Zip file and after that you will receive a mail for ‘Downloading Achieves’ link.
To follow this mail open your Inbox and download it. This will be downloaded as “Takeout” name.

After unzipping the folder the file will be present as “.mbox” extension.
Now to read this you need to download software called Mozilla thunderbird – free available on the internet. Simply go to this website : http://www.mozilla.org/thunderbird
Now have patience and download on extension named ‘import export’ tools. It’s actually an Adds-on extension for Mozilla thunderbird.
Website to download this http://addons.mozilla.org/enus/ thunderbird/addon/importexport-tools/
Installs this extension by checking on the “Add ons”option. This will show you a dialog box; choose the path where you have kept that file.
Finally close and start Mozilla Thunderbird.
Click on right option pane –“Import Export tools”. Now your downloaded ‘.mbox’ file extension will be added.
Here, Import Directly from one or more ‘.mbox’ files – founded. Click OK.
Go to unzip file folder and select the file under this folder.
Now, you can read all your deleted, spam, trash, mails and messages.