The two drives are/were both 32G Lexar JumpDives bought together and only used for my unRAID server. Each failed in a similar way. I can't see any files when mounted on my server or in my macbook. When I fired up Disk Utility on the mac to see if I could possibly reformat and reinstall the os, it just hung, and was never able to even see the drive. Also, I have a tool called SpinRite which I've been using for decades to recover spinning drives and have had good luck with SSDs and flash drives as well. SpinRite hung too when trying to analyze the drives. I've learned over the years that if SpinRite can't bring it back, it's gone.