Will old backups automatically be deleted from Amazon S3 storage?

Hi – I’ve successfully set up Amazon S3 as my backup destination (using the instructions here). I just have one question: if I want to keep my Amazon S3 storage from just growing constantly, do I need to set a “Lifecycle Policy” on the bucket I created there, telling it to delete anything older than, say, 30 days? I’ve configured UpdraftPlus to do a full backup weekly, and to keep only two at any given time, but I’m unclear whether it will automatically delete previous backup files on Amazon S3 by default. Thanks!