Description
Google takeout allows you to download all your Google data from any and all Google applications including Gmail, youtube, google forms, and many more.
You can simply access the page by going to https://takeout.google.com/. Once you are there, make sure you are logged in the correct google account. Then you can select all or individual applications you want to be included in your archive.
Google will backup all the data and make it available for download within a few hours or a few days, depending on the size.