The WD4000KS is a Western Digital Caviar SE16 3.5-inch internal hard drive offering 400GB capacity with SATA/300 (3.0 Gb/s) connectivity. Operating at 7200 RPM with a 16MB buffer, this drive delivers reliable performance for general-purpose storage, archival systems, and non-critical server deployments. Compatible with standard SATA-enabled systems including older enterprise servers, workstations, and desktop configurations that accept 3.5-inch form factor drives. Typical use cases include cold-storage backup arrays, replacement storage in legacy equipment, and capacity expansion in budget-constrained environments. This drive is fully tested and guaranteed. Available via quote.
