Mcafee related?
DOes someone think this is the kind of device his deadman’s switch is stored on?
WD My Book Live users wake up to find their data deleted
https://arstechnica.com/gadgets/2021/06/mass-data-wipe-in-my-book-devices-prompts-warning-from-western-digital/
My guess is that it's a pre-ransomware attack. I've always wondered why ransomware victims don't just go to their latest backup and recover from that rather than paying out a ransom. Now, perhaps, the ransomware guys are going in and wiping the backup drive while installing their ransomware for future use.