Additional Information

**Solid-State Drive (SSD)** is a data storage device based on an array of semiconductor flash memory chips. Its internal structure primarily consists of a controller, cache memory, and NAND flash memory chips. It contains no mechanical moving parts, offering high read/write speeds, low access latency, and excellent resistance to shock and vibration. Mainstream products utilize physical interfaces such as SATA, M.2, or PCIe, and support the NVMe protocol. **Hard Disk Drive (HDD)** is a traditional data storage device that uses magnetic platters as its storage medium. It is composed of precision mechanical components including platters, read/write heads, a spindle motor, and control circuitry. Data is read and written by positioning the read/write head over the rapidly spinning platters. Its characteristics include high cost-efficiency per unit of capacity and stable long-term data retention.