How to fix corrupted external hard drive after upgrading High Sierra to Mojave?

Posted by Katrina to Mac Data Recovery on October 29th, 2018

macOS Mojave 10.14 is much better than High Sierra, both in performance and UI experience. Lots of people have upgraded High Sierra to Mojave, but the new thing is not always the best. Many people complained that their external hard drives get corrupted after upgrading High Sierra to Mojave. This passage will show you some troubleshooting solutions.

Fix corrupted external hard drive after upgrading High Sierra to Mojave

Quick fixes for corrupted external hard drive after upgrading High Sierra to Mojave

1. Check if the external hard drive is properly plugged in and powered on if necessary.

2. Try a different a port/hub or plug another device in to see if the port/hub works.

3. Connect the external hard drive with a different cable to make sure it is not at fault.

4. If you have another Mac computer at hand, please plug the external hard drive in to see if it works. If the external hard drive works as usual, it is the problem with your Mac computer. If the drive still keeps corrupted, there might be problems with the drive itself. Fortunately, you still have ways to fix the corrupted external hard drive after upgrading High Sierra to Mojave.

Data Recovery from corrupted external hard drive after upgrading High Sierra to Mojave

First of all, you need to make sure that you have backed up important files. This is because any operation is possible to overwrite the original data, including the process of disk repair. Forget to make any backup? You can make use of professional Mac data recovery software like iBoysoft Mac Data Recovery to recover data from corrupted external hard drive.

iBoysoft Mac Data Recovery is a free external hard drive data recovery tool that enables you to recover data from corrupted external hard drives, recover data from the unmountable external hard drives, but also recover data from formatted external hard drives, recover data from inaccessible external hard drives, recover data from unreadable external hard drives on macOS Mojave 10.14/High Sierra 10.13/10.12 and Mac OS X 10.11/10.10/10.9/10.8/10.7.

Tutorial to recover data from corrupted external hard drive on Mac with iBoysoft Mac Data Recovery

Step 1: Download and install iBoysoft Mac Data Recovery on Mac.

Step 2: Launch iBoysoft Mac Data Recovery.

Recover data from corrupted external hard drive on Mac

Step 3: Select the corrupted external hard drive drive and click "Next" button to scan all lost data.

Step 4: Preview the searching results, choose files we need, and click "Recover" to get them back.

Step 5: Have a check to ensure we have got all lost data back.

Fix 1: Use Disk Utility

For minor corruption and issues with your external drives and internal hard disk, you can take advantage of Disk Utility's First Aid options, which is able to verify and repair file system corruptions. To fix corrupted external hard drive on Mac, just follow the steps below:

Step 1: Launch Disk Utility.

Step 2: Choose the corrupted external hard drive on the left sidebar.

Step 3: Select First Aid in the top center and click Run.

First Aid

Fix 2: Run Terminal

Terminal is a powerful tool to control parts of the macOS interface. If Disk Utility fails to repair the external hard drive, you can run some commands in Terminal to fix corrupted external hard drive after upgrading High Sierra to Mojave.

Step 1: Go to Applications > Terminal

Step 2: Enter: diskutil list (This will list out the available volumes).

Step 3: Check the volume identifier from the table that appears.

Step 4: Enter: diskutil repairVolume [diskvolume identifier]. For example, if the volume identifier of external hard drive is disk2s, you should enter diskutil repairVolume disk2s.

Fix 3: Run FSCK command in Single User Mode

FSCK command is used to check and repair the errors in the file system. You can use it to check logical problems on external hard drives. To run the command, you have to go to Single User Mode firstly.

Step 1: Restart your Mac and, before the Apple logo appears, hold down Command and S keys. This will boot your Mac into Single User Mode.

Step 2: 2. Type in: /sbin/fsck -fy.

Step 3: If you see "File system was modified", then re-type in the command again until you see "The volume _ appears to be OK".

Step 4: Type in reboot to restart your Mac.

Run FSCK command in Single User Mode

Fix 4: Erase the external hard drive with Disk Utility

Step 1: Launch Disk Utility from Utilities.

Step 2: Click the icon of the corrupted external drive on the left part of the window.

Step 3: Click the Erase function on the top of the Disk Utility window.

Erase external hard drive

Step 4: Complete the related information (name, format, scheme), then click Erase button.

Fix 5: Send the corrupted external hard drive to local repair companies

If after trying the solutions above, your still can't use the external hard drive. Unfortunately, your external hard drive might have some serious hardware problems. You can try iBoysoft Mac Data Recovery to recover lost data back and then send the corrupted external hard drive to local repair companies.

Why do external hard drives get corrupted after upgrading High Sierra to Mojave?

Compared to internal hard drive, external hard drives is prone to corruption as it is plugged and unplugged between different computers. As well, a corrupted external hard drive can be damaged due to various reasons. Learning these reasons helps you prevent corruption.

  • >Improper hard drive formatting
  • >Unsafe ejection of the external hard drive
  • >Operating system re-installation
  • >Sudden power surge
  • >Hardware failure

Still have questions?