Ugh. I thought WD and SanDisk were reliable brands. But this doesn’t sound like just a bad batch, or even a bad model. A good company would be able to own up to those things, and steer customers to other models while they fix the problems. This sounds like bad corporate culture, which is likely to infect their other products, too.
I’m very disappointed. Unless they come clean about what’s going on and how they’re going to prevent it in the future, I’ll be avoiding WD products now.
It’s also a good reminder to have multiple copies of any data you care about.