Data storage requirements have kept increasing over the last several years. SSDs have taken over the role of the primary drive in most computing systems. However, when it comes to sheer bulk storage, hard drives (HDDs) continue to be the storage media of choice in areas dealing with large amounts of relatively cold data.
Since the release of the last HDD guide, we have seen the announcement of 24TB CMR drives from both Seagate and Western Digital. The 22TB and lower capacity drives have also seen price reductions. Meanwhile consumer SSDs have seen a resurgence of their own, thanks to a recent (and temporary) bust in flash memory prices. Even with this, it's not enough to challenge large HDDs on a $/GB basis, but it's made things a bit more interesting at the 8TB capacity point.