So that is my current backup strategy on top of the redundancy offered by RAID. Just to recap, I am using the following features of Synology NAS for file/ content backups:
|Cloud Station||File-level||Backing up of files on mobile phones|
|Cloud Sync||File-level||Backing up of files to Cloud Provider(s)|
|Hyper Backup||Image-level||Backing up of files, app data and system settings to Cloud Provider(s)|
|Time Machine||Image-level||Backing up of Macintosh's data|
Lastly, do keep your precious data safe. If you find the above a hassle, at least do a periodic data scrub.