The Seagate IronWolf Pro ST20000NT001 20 TB is a 3.5-inch internal NAS hard drive with 20 TB of storage capacity. It is designed for professional NAS and RAID environments as well as 24/7 continuous operation and supports NAS systems with an unlimited number of drive bays.

The hard drive uses CMR (Conventional Magnetic Recording) technology, operates at 7,200 RPM, and features a 256 MB cache. The SATA 6 Gb/s interface enables connection to compatible NAS and server systems. The helium-filled drive design supports the model's high storage density.

The IronWolf Pro ST20000NT001 is designed for a workload rate of up to 550 TB per year and an MTBF of 2,500,000 hours. Integrated rotational vibration sensors support use in multi-bay NAS systems. The manufacturer's warranty includes a five-year limited warranty and three years of Rescue Data Recovery Services.