Live SSD, NVMe, NAS and hard drive prices from Amazon.com, ranked by price per terabyte.
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20TB is high-capacity storage for dense NAS builds and large archives, and it sits near the best price per terabyte on the market. These drives are CMR, helium-sealed enterprise models that run cool and are rated for 24/7 use. Fewer, larger drives mean less power and fewer bays for the same total capacity, which matters in a serious NAS. The table ranks every in-stock 20TB drive by live $/TB.
At 20TB you are buying enterprise-class hardware: helium-filled, CMR, with high workload ratings. The appeal is efficiency, one 20TB drive replaces two 10TB drives, saving a bay and cutting power draw for the same capacity. Recertified enterprise 20TB drives frequently post the lowest $/TB anywhere, at the cost of a shorter warranty, so pair one with a solid backup.
For large NAS and archives, yes: 20TB is near the best price per terabyte and saves power and bays versus smaller drives. They are CMR helium enterprise models built for continuous use.
A CMR enterprise model such as Seagate Exos, WD Ultrastar, or the Pro NAS lines. Recertified enterprise 20TB drives can offer the lowest $/TB. The table ranks them by live price per terabyte.
20TB carries a high total price but among the lowest cost per terabyte. See the table above for live 20TB prices and the current best $/TB.