My 1TB G-Drive stopped showing up in Finder last week. It worked great for years, but then it stopped while it was plugged in. I’ve tried resetting my USB ports, using Disk Utility, trying different cables, different USB ports, and different computers. Nothing I do makes the drive show up in Finder.
I even bought a new enclosure for the drive, but that didn’t work, either.
When you connect an external hard drive on Mac, it will show up on Desktop, Finder, and Disk Utility. But sometimes the external drive won’t appear on any of these places. To fix the issue, you can try the below methods:
Change MacOS settings
Reset Mac firmware settings
Fix external hard drive connectivity issue
Troubleshoot external hard drive
Recover data from non-mounting external mac hard drive using reliable data recovery software
Further, I suggest you to check the below link for detailed steps to be followed in each method above.