A solid state drive (SSD) is a data storage device^* that uses semiconductor memory (typically NAND flash memory). The term "SSD" is generally used to mean a data storage device that can be used in place of a hard disk drive (HDD) as the main storage device for a computer. Consequently, most SSDs available on the market today use existing HDD form factors and interfaces.

* A device used for recording or storing data, such as an SSD, HDD, SD Memory Card, or USB memory device.