I know there’s probably plenty of threads on this but I couldn’t find one to help me.
I have a 1TB WD external hard drive (doesn’t have a power switch) and had it about 8 months. Today it stopped turning on. Power is reaching it as the blue LED shines on. I have attached it to the wall socket. I have unplugged and plugged everything back in several times, but there is no spinning within the drive that i usually hear and of course it’s not showing up in Finder.
If your data are more valuable than your warranty, remove the drive from the enclosure.
Then connect it directly to your computer’s motherboard. This will isolate the fault to the drive, or to the USB-SATA bridge board inside the enclosure.