Recommended settings for Snapshot Backups

My backups are blowing up HUGELY. Backing up the backups of the backups, etc…. and saving more backups than I’ve asked it to.

What are the recommended settings for weekly backups on a basic website?

We only make changes once or twice a week.

Does Snapshot remove older snapshots once it gets to the limit you set? I had my weekly backups set to keep 10, but I had backups from April still saved…

My webhost was not happy with me when I was taking up so much space with my snapshots. OOPS! So I just want to get this set right so as not to blow things up again.