Hey Everyone, So I may have figured out a fix for external hard drives not mounting at least to a MacBook pro. I noticed my hard drive wasn't mounting with my laptop after I didn't press the unmount button before removing the cable. It has worked still with PC's though. To get my MacBook pro to work again, I had to create a new Apple profile for my MacBook. I noticed the external would work on the new profile but not on my original admin profile. But after it mounted on the new profile, I logged out and logged back into my admin account and sure enough, it started mounting again like new. Worth a try right? I have updated to the most current Sur version by the way.