This is currently not possible using only ROCK. It's a feature request that has gone out to the Roon team. You need to backup using other means outside of ROCK at this point.I was referring to the media itself. I do use the internal HDD in the NUC for my media but I also keep a copy on my NAS (yes, I'm a belt and suspenders kind of guy).
It would be convenient if there was an easy way to keep them synched using ROCK.
-edit- I assume you could add rsync to ROCK, but I do not know. Anyone tried it?