This doesn’t make sense; three drives failing at virtually the same time with similar faults. I would be looking elsewhere, Mbo, PSU, voltage spikes. Do you have the event viewer logs?
I agree - but checked all that - don't forget my main storage drive died after a long trip in the car with the machine. The other two drives - all I can think is that I somehow gave them a dose of static when handling them. I was very careful as usual, but it is what it is. So from now on as I had no warnings about these mechanical drives failing in any way, I will make several copies of important documents etc on different media + cloud as well.
Mark