The Disk You Inserted Not Readable By This Computer. What?
I've been using an external hard drive (usb) for a few months. As I was dropping footage to back up on the drive I've received an error that the disk is not readable. I have important files on there that has not been backed up to a second source, do how do I get my computer to recognize the hard drive without formatting! I also can see it on my Disk Utility but it won't allow me to repair the drive until I format it. What are my options?
iMac, OS X Yosemite (10.10.5)