The Western Digital Caviar SE WD400BB-75DEA0 is a 40GB 3.5-inch internal hard drive featuring a 7200RPM spindle speed and 2MB cache buffer. It connects via ATA-100 (PATA) interface, delivering sustained throughput suitable for legacy desktop systems and workstations from the early 2000s era. The drive is compatible with standard IDE/PATA-equipped motherboards and systems requiring parallel ATA connectivity. Typical applications include general-purpose computing, file storage, and archival use in non-critical environments. This drive represents the consumer-grade capacity class and is best suited for secondary storage roles or systems with limited capacity requirements.
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