In about few days ago, I wrote a post on how you can backup your Google+ account details with the Google Takeout feature. But, as I was browsing through my google account page today, I came across another simply method which you can use to back up your google data without much stress.
The step is very easy to use once you have a google account and if you are already on Google+ service.
You need to go to this page on your google account once you logged in and then click on Data Liberation. After that, you can then choose the data which you wants to back up unto your computer system hard disk and immediately the data will start downloading to your computer.
You can use the image above to understand how to go about it.