The Data Retention feature gives the option for developers to automatically remove data from the bucket after a defined period of time. The goal is to help customers to avoid unnecessary costs with data that don’t need to be kept for a long period of time.
You can set the retain data to “Forever”, it means that the data in that bucket will never be deleted automatically, or you can set to days or even months. For example, setting it to one day means that data will remain in the bucket for the time of only one day.
Data Retention is configurable for each bucket and it is disabled by default (set as Forever).