**WD Ultrastar DC HC550 16TB 7200RPM SAS 12Gb/s 3.5?? HDD (WUH721816AL5204):** A high-performance enterprise-grade hard drive designed for data-intensive environments. Features 16TB helium-sealed storage (HelioSeal?), ensuring enhanced durability, lower power consumption, and cooler operation. Delivers rapid 7200 RPM speeds and 12Gb/s SAS interface for high-throughput data transfer, ideal for cloud, AI, and big-data workloads. Supports up to 550TB/year workload tolerance, ensuring reliability under heavy use. Includes advanced error correction, vibration protection, and 5-year limited warranty. Built for scalability, efficiency, and mission-critical storage in enterprise servers and data centers.