Report ID: WIN11-WD-SES-2024-01 Date: [Current Date] Subject: Analysis, Diagnosis, and Resolution of WD SES Device Driver Issues on Windows 11 Target Audience: End Users, IT Support Technicians, System Administrators 1. Executive Summary The WD SES Device (Western Digital SCSI Enclosure Services Device) is a component of Western Digital external hard drives (My Book, My Passport, Elements, etc.). It manages LED status lights, drive health monitoring, and safe removal notifications. On Windows 11, users frequently report a yellow exclamation mark in Device Manager under "Universal Serial Bus devices" or "Storage controllers," indicating a driver failure (Error Code 31, 10, or 39).