I am beyond fruustrated not even a month ago. I bought this hard drive and I feel like I wasted almost $100. It was working perfectly fine a 2 weeks ago and now all of a sudden its not mounting, the hard drive is not even showing up on my desk top. Nothing is working. It seems like this hard drive is not made for Macs at all.
What troubleshooting steps have you tried so far?
You can disconnect and reconnect the drive to see if it mounts.
Also, make sure the drive is not password protected.
Check if the drive appears on disk utility.