Prevent Client from Syncing Folder/File deletion to NC Server


I have connected my grandmother’s computer to my NC server using the client but I am trying to find a feature that will prevent any deletion she does on her computer from being synced to NC. The Google Backup and Sync client has an option to not remove files/folders already in the cloud if they are deleted on the local machine and that is the goal I have with NC if it can be done.

Please let me know if this can be done. I would like to keep her computer backed up to my NC instance in the event it fails but I also want to retain any file she creates if a deletion is accidental.

Thank you, SgtKilgore406