My Passport for Mac doesn't mount on M1 MacBook Air

I bought two new My Passport Ultras for Mac and neither will mount on my new M1 MacBook Air running Big Sur. They don’t show up on my Desktop, in Finder or in Disk Utility. I contacted Apple Support and they couldn’t get them to mount either. Contacted WD support and only receive an Incident Confirmation reply. I’ve used a few WD external drives for Mac previously and have been happy with them. But if I don’t find a solution very soon, these are going back. TIA.

Hi @rpf ,

Please refer below link to check WD external drive is not seen by Windows or Mac and data on the drive is inaccessible
https://support-en.wd.com/app/answers/detail/a_id/21239

SYSTEM COMPATIBILITY
• Formatted HFS+ Journaled for
macOS Mojave, High Sierra,
Sierra or El Capitan.
• Downloadable HFS driver to
read⁄write on Windows®
.
• Compatibility may vary depending
on user’s hardware configuration
and operating system.
Compatibility may vary depending
on user’s hardware configuration
and operating system.