Dont get snapshot retention

I dont understand the current snapshot retention. How can i make it, that it saves only one snapshot every week when they are a week old, and only one when they are a month old? Until then, once per day?

It can’t do “only one when they are a month old”. The closest is maybe “delete snapshots older than 360 days, keep 1 snapshot every 7 days if older than 7 days, and keep 1 snapshot every day if older than 1 day”.