WD Ultrastar DC HC550 512E 18TB 3.5″ 512MB WUH721818ALE6L1 HDD Hard Disk Drive

**WD Ultrastar DC HC550 18TB HDD**: A high-capacity enterprise-grade hard drive designed for data-intensive environments. Features 18TB storage, 512MB cache, and 512e sector formatting for enhanced compatibility. Built with HelioSeal helium technology, it ensures lower power consumption, reduced heat, and increased reliability. Optimized for cloud storage, data centers, and heavy workloads, it offers a 550TB/year durability rating, vibration resistance, and advanced error correction. Combines massive storage density, energy efficiency, and enterprise-level performance for scalable, high-demand applications.