Western Digital Caviar Green 3TB hard disk drive (part WD30EZRS-42KEZB0) is a 3.5-inch SATA drive designed for energy-efficient storage in external enclosures and NAS systems. The drive spins at 5400 RPM with a 64MB cache buffer and connects via SATA 3GB/s interface. With 3TB capacity, it suits archival, backup, and media library applications where performance demands are moderate and power consumption is a consideration. Typical use cases include external drive enclosures, small-office backup systems, and home media servers. The Caviar Green line emphasizes thermal efficiency and quiet operation for 24/7 operation environments.
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