If you say we have 30 files per month and etc. that's true. But some times we have 0 files per day, some times 5 files per day. So if forgot about how files old, i just need have left last 20 files.
If this possible i can mix this rules
There isn't a native way that I can think of that combines a age + minimum number of files as you'd have to define what files to keep in those 20 files that are left. Just keep the newest?
max-deletes if for sync and not related to this.
You'd probably have to wrap a script around it and create the logic you desire.
Yeap, i try save 20 newest files as minimum.
I mean i want save files for last 45 days, but minimum last 20 files must be saved.
For now only way what i see is copied files back from cloud to PC, make correction and send it back to cloud. It is so stupid - so i left it for the last decision