HDD 12TB WD RED PRO 256mb cache 7200rpm SATA 6gb/s 3.5'

With drives up to 12TB, the WD Red drive is built for single-bay to 8-bay NAS systems and packs the capacity to store your precious data in For up to 24 bay medium to large-scale NAS environments, the WD Red Pro drive is engineered to handle increased business workloads and carries a 5-year limited warranty. https://www.wd.com/en-ie/products/business-internal-storage/wd-red-pro.html