Save a copy of a Bootable Clone

I’m revisiting my backup strategy. I’m using SuperDuper to create a bootable clone of my hard drive on a weekly basis. How can I save a copy of that clone on a quarterly basis that I can put on my Synology? I’m already using Backblaze and Arq so is that just overkill? Thanks

http://www.macdrifter.com/2014/03/disk-image-backups-to-a-nas.html

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