WD Ultrastar DC H550 18TB Enterprise 3.5inch HDD WUH721818ALE6L4

**WD Ultrastar DC H550 18TB Enterprise HDD (WUH721818ALE6L4):** A high-capacity, enterprise-class 3.5-inch HDD designed for data-intensive workloads. Features 18TB storage, HelioSeal® technology (hermetically sealed with helium) for reduced power consumption, enhanced cooling, and increased reliability. Optimized for cloud, hyperscale, and storage infrastructure with 7200 RPM speed, 512MB cache, and SATA 6Gb/s interface. Delivers industry-leading 2.5M-hour MTBF, 550TB/year workload rating, and advanced error-correction for 24/7 durability. Energy-efficient design lowers TCO, while RAID-specific vibration protection ensures consistent performance in multi-drive systems. Built for demanding enterprise environments seeking scalability, endurance, and data integrity.