The Seagate IronWolf Pro is a 3.5-inch 4 terabyte (4,000 GB) hard drive designed by Seagate specifically for long-lasting continuous use in NAS servers or small server systems. With a workload of up to 300 TB per year , the NAS hard drive can also be used by multiple users.The Seagate IronWolf Pro at a glance:- 4 terabytes (4,000 GB) of storage capacity- Long-lasting 3.5 \"form factor NAS hard drive- Fleet 7,200 rpm & 128 MB cache- 214 MB / s data throughputModern SATA 6G interfaceThe drive has a state -of-the- art SATA 6G interface, a 128 MB buffer and the platters rotate at