HDDs also have an advantage on capacity. It’s much cheaper and much easier to match a hard drive with large-capacity platters than it is actually to fit an SSD with a comparable level of memory; so, if you need 4TB or 8TB per drive, your solid-state possibilities are incredibly constrained. https://thefairlist.com/story4565353/getting-my-solid-state-hard-drive-with-different-capacity-to-work