Can you tell me how the hard drives + NAS work?

[SBBcarl]

I have two WD 4tb purple drives in my NVR and a 3tb NAS configured within the NVR itself, not to individual cameras.

I see that my two internal drives are full but the NAS is not.

Are all these drives redundant and recording the same data to three separate drives or am I misunderstanding?

End goal is I would like to have as much footage backed up to the NAS as possible in unlikely even the NVR was stolen / damaged.

Do I need to configure something for this redundancy?

 

[GCoco]

What NVR model is it? Did you search these forums. I’ve seen some threads about this before.