Step by step tutorial with screenshots here:
https://memberfix.rocks/aws-backup/
In this video you'll learn how to offload your Amazon S3 buckets to your local storage and back up your important files on your hard disk.
You can then obviously duplicate the backed up AWS buckets onto another cloud storage solution like Google Drive or Dropbox if you wish.
This tutorial uses the CLI (Command Line Interface) but is quite simple to do if you just follow the steps in the article, which you can find here:
https://memberfix.rocks/aws-backup/
Enjoy!