I have a two bay NAS, and the idea was to just fill it with older used drives from my PC’s. I was going to upgrade the NAS to a four bay, but I discovered that the drives in the PC’s are mostly SMR, which I gather are not great for a NAS. So now my question is, do I continue with my plan to get a four bay NAS or do I just stick with the 2 bay and get two large NAS specific drives ~ which cost about the same as buying a new four bay NAS?