The Hitachi Travelstar Z7K320 (part no. 0J13203) is a 2.5-inch SATA hard disk drive rated for 320GB capacity at 7200 RPM with a 16MB cache buffer. It connects via SATA 3GB/s interface and is designed for portable and notebook computing environments where compact form factor and moderate performance are required. The drive supports standard SATA protocol compatibility across legacy and modern systems. Typical applications include external enclosures, portable backup solutions, and replacement drives for business laptops and ultrabooks where 2.5-inch drives remain standard.
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