Western Digital Mechanical Hard Drive 1t Storage 3.5 Surveillance...

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容量：HDD的传统优势，单盘主流容量已从过去的MB级提升至4TB到22TB，能满足海量数据存储需求。

转速 (RPM)：指盘片每分钟旋转圈数，直接决定读写速度。数值越高越快，但噪音和发热也越大。常见转速有：

5400 RPM：常见于笔记本和移动硬盘，功耗低、噪音小。

7200 RPM：台式机主流选择，性能更强，适合需快速访问数据的场景。

10000 / 15000 RPM：企业级硬盘专属，为追求极限性能和低延迟设计。

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Capacity: The traditional advantage of HDD, the mainstream capacity of a single disk has increased from the past MB level to 4TB to 22TB, which can meet the demand for massive data storage.

Rotation speed (RPM): It refers to the number of revolutions per minute of the disk, directly determining the reading and writing speed. The higher the value, the faster it is, but the noise and heat are also greater. Common rotation speeds include:

5400 RPM: Commonly found in notebooks and portable hard disks, with low power consumption and low noise.

7200 RPM: Mainstream choice for desktop computers, with stronger performance, suitable for scenarios requiring quick data access.

10000 / 15000 RPM: Exclusive to enterprise-level hard disks, designed to pursue extreme performance and low latency.