Feature Request: Sync files when charging, but don't delete local copy for 90 days

I use the feature to sync certain folders when on WiFi and charging, but would like nextcloud to delete the local copy 90 days after a successful sync.

I like to keep recent photos on my device and would prefer to have nextcloud sweep my device daily to identify files that were successfully synced over 90 days ago and can now have their local copy deleted.