External hard drive won’t mount to MacBook pro

coco0216 wrote:

I connected an external hard drive to MacBook Pro to back up. I’ve been using them for years and never had problems.



When I connect the external hard drive to MacBook Pro, it usually shows an icon and I can start back up but I don’t see the icon anymore. MacBook Pro is working fine and external hard drive is blinking and vibrating but not mounted. I tried Disk Utility, selected side bar “backup” and click “mount” but nothing. I click “First aid” but error message says “it’s failed and backup disk is not connected”.

I also turn off and on MacBook Pro. Disconnected and connected the external hard drive but no luck.

Please help.

It sounds like the drive has failed...

You can try —

• a different port
• a different cable
• a different enclosure to test

Mount a volume that's been ejected using Disk Utility on Mac

Try a different drive and compare your results.

All drives will fail in time, not if but when...

3-2-1 Backup Strategy: three copies of your data, two different methods, and one offsite.