The 4TB Re Datacenter 7200 rpm SATA III 3.5" Internal HDD from WD delivers durable capacity storage for high-availability deployments. With an error tolerance of <1 in 10¹⁵, an MTBF of 2 million hours, an AFR of 0.44%, and 600,000 load/unload cycles, it helps provide durability and 24x7x365 reliability in tightly packed vibration prone multi-drive systems. In addition to its performance and robust design, its capacity of 4TB makes this drive well suited for heavy workload environments, cloud storage, RAID arrays, external storage arrays, date warehousing, and mining applications.