Not recognized in computer

I have a My book external hard drive WCASU 2927226 all of the sudden the computer does recognize the hard drive. Do I need to download something? I know its old but it was still working not to long ago.

Hi @amb40,

Please refer to the article:External Drive Not Detected by Windows or macOS: Resolve External Drive Not Detected by Windows or macOS Guided Assist

Have you opened a Support Case? If not opened, for more information, please contact the WD Technical Support team for the best assistance and troubleshooting: