Seagate Exos 7E8 4TB 512n SATA 128MB Cache 3.5-Inch Enterprise Hard Drive ( ST4000NM002A )

• High-Reliability Drive for servers, storage systems, and business-centric NAS systems
• Performance-Optimized for heavy application usage, supports workloads of up to 550TB per year—10× that of desktop hard drives
• Designed for 24×7 storage environments and backed by a 2 million hour MTBF rating
• Seagate Enterprise drives are built on 40 years of enterprise workload knowledge and experience