WD My Book is an external desktop storage device that is widely used to save the system data. Using the My Book device, you can back up your system data. The drive is password-protected using the WD SmartWare or WD Security app. To access your files stored in the Wd My Book device, you have to enter the password that you have created during the first-time device setup. If you forgot WD My Book password, you cannot reset or recover it using the WD SmartWare software. The only solution is to erase the My Book device data to continue using it. However, you can recover the erased data later using any trusted third-party data recovery software.