The WD SES Device Windows driver is a driver used by Western Digital (WD) external hard drives and other storage devices. SES stands for SATA Enclosure Services. This driver is typically required for communication between your computer and WD's external drives, especially when the drive includes additional features like password protection, encryption, or other advanced management tools that are part of WD's proprietary software suite (e.g., WD Security, WD Drive Utilities).

The WD SES driver allows the computer to recognize and properly communicate with certain WD external drives, ensuring that the drive functions correctly and that you can access all its features.