Delete backups older than X days (Full and Incremental)

Hi everyone.

I have almost 100 sites with daily backups enabled and growing at a nice pace. Sadly, daily old backups are pilling up at the speed of light, and deleting them manually site by site is getting absolutely insane.

Anyone knows how to deal with this using a cronjob?

already have ? or not yet ?

Interested in a solution about this also, I keep deleting them manually would be very helpful if someone got a solution to share it here