Only Seagate has been making drives specifically for surveillance storage for ten years. SkyHawk™ is built to keep systems in the field longer and reduce the need for post-deployment support.
According to TerraMaster, this NAS supports a total internal storage capacity of 64TB using eight 8TB M.2 SSDs, but the company does not actually list any 8TB SSDs on the compatibility chart.
I would add to that you can never have too much storage space for your data to that maxim. And it looks like SanDisk agrees with me as the brand has just announced a new 8TB desktop SSD for those ...