We've had success with Clumio Protect for backing up AWS data, particularly S3. A commercial SaaS solution, Clumio Protect can also back up a range of other AWS services and stores the data offline where it is not accessible through the internet. Our teams responsible for handling data protection and recovery at massive scale found that Clumio Protect is easy to set up and maintain and far outperforms the native AWS Backup service when S3 buckets are particularly big.