We work with a lot of companies (especially in the finance industry) that have strict rules regarding the minimum time data needs to be kept for. This can become quite onerous and expensive if you need to keep customer records for a minimum of seven years, for example.
Using S3, Glacier, and life cycle rules, we can create a flexible long-term backup solution while also automating the archiving and purging of backups and reducing costs.
We are also going to utilize versioning in order to mitigate the damage caused by a file being accidentally deleted or overwritten in our backup bucket.