WD external hard drive not mounting on High Sierra/Mojave, how to recover lost data?

Posted by Molly to Mac Data Recovery on June 13th, 2018

I have a WD External USB 2 Hard Drive. When I connected to my High Sierra iMac, I can see it under External in Disk Utility but greyed out, no longer mounts on desktop or sidebar. The drive is powered and I can feel it spinning in case. How to fix WD external hard drive won't mount High Sierra error? Plus, being a photographer, I have tons of important photos and videos in it. So I must do data recovery on this unmounted WD drive.

Normally, when we plug in a WD hard drive to Mac, it should be mounted on the desktop, in Finder menu and in Disk Utility. Besides, operations including reading, writing, copying, deleting and transferring files on the mounted WD drive should be processed smoothly. However, what if the WD external hard drive won't mount in High Sierra and you desperately need to access the data stored on it?

Why my WD external hard drive won't mount in High Sierra?

For Mac computer, the WD hard drive is an external storage device. It's very common for external storage devices like WD external hard drives won't mount on Macs. The reasons could be varied:

1. Connection problems, such as USB cable/port error, power error, etc.

2. Mac settings, such as whether or not allowing to show external disks.

3. WD hard drive problems, such as file system corrupted, disk error, partition failed error, bad sector and so on.

4. Improper operation while writing or transferring files on WD hard drive.

5. Virus attacks.

This tutorial for external hard drive not mounting in macOS Mojave may be helpful for troubleshooting.

How to recover data from unmountable WD external hard drive in High Sierra?

If you have important files stored on the unmountable WD external hard drive, then data recovery is a must. You can try iBoysoft Mac Data Recovery, trustworthy data recovery software for macOS Mojave 10.14/High Sierra 10.13/Sierra 10.12 ‎and Mac OS X 10.11/10.10/10.9/10.8/10.7

iBoysoft Mac Data Recovery is easy to use and able to recover lost data from unreadable external hard drive, unmountable hard drive, recover data from unreadable USB drive, etc.

What's more, it is the best APFS data recovery that supports recovering lost data from encrypted APFS volumes, recovering data from formatted APFS drives, recovering lost data after APFS container is gone, etc. It's able to recover photos, videos, music, emails, documents and other file types.

Tutorial to recover lost data from unmountable WD external hard drive with iBoysoft Mac Data Recovery

Step 1: Download iBoysoft Mac Data Recovery and install.

Step 2: Launch this program. Select the unmounted WD external hard drive

Step 3: Click "Next". The program will start scanning WD external hard drive for lost files.

Recover data from unmountable WD external hard drive

Step 4: When scanning finished, you can click the found files to preview. Choose all or only the correct files and click "Recover", the recovery process will begin.

Step 5: through the recovered files to make sure all desired files are back.

Except recovering lost data from external hard drives, iBoysoft Mac Data Recovery can also recover data from SD card, USB drive, memory cards, digital camera and other storage devices.

How to fix WD external hard drive not mounting on High Sierra?

If your WD external hard drive is not mounting on macOS High Sierra, you can fix it with Disk Utility, which is the built-in tool of Mac to deal with disk errors.

Step 1: Go to Disk Utility.

Step 2: Select the unmountable WD external hard drive from the sidebar.

Step 3: Click First Aid on the top of the window.

If Disk Utility failed to fix the WD external hard drive, you need to erase or reformat it in Disk Utility in order to make it reusable.

Still have questions?