It would be nice to be able to set up different retention settings for each storage option. I have one site that I like to send backups to both Dropbox & Google Drive for redundancy, but I really only need that kind of redundancy for that last handful of backups. Being able to set a different backup schedule (or at least different retention rules on the same backup jobs) specific to each storage configured would be an excellent feature to add.
One of your new competitors, WPVivid, already has this and based on some of the WordPress groups I belong to on social media, it’s been one of the primary reasons people are choosing them over UpdraftPlus.
This idea was posted in UpdraftPlus - backup/restore plugin and tagged remote, retention, schedules on July 6, 2020 by 
Sharif.
Hi,
Thank you for the suggestion. This is quite a popular suggestion and consequently we have begun work on it.
David
Has this happened?? HOW do I do it?
This is now undergoing final testing.
is this still undergoing testing?
Yes, Yes, Yes!!!