The SMI 320 Factory Driver is a Windows driver associated with SMI (Silicon Motion, Inc.), a company that designs and manufactures semiconductor products, including controllers for storage devices (e.g., SSDs), displays, and other embedded systems. The SMI 320 specifically refers to a flash memory controller or storage-related hardware component from Silicon Motion, typically found in SSDs and other storage devices.

The "Factory Driver" typically refers to a driver intended for use during the manufacturing process or for initial setup, often used to configure or test hardware during production. It may be used to interact with the SMI 320 controller or other related components in a storage device, particularly for purposes like firmware updates, diagnostics, or performance optimization.