Fix error 0 on an External Hard Drive

When inserting an external hard drive into my Mac, I got the message ' error 0', and can't access the stored data on it. Does anyone know how to get to the hard drive?

Best Answered by

Brithny· Answered on Mar 20, 2024

If you got the message ' error 0' when inserting a hard drive into your Mac, which means the drive is not mounted successfully, and you can't access the stored data from it, don't worry! We provide 4 tested solutions to fix this unmounting error.

Before fixing the unmounting error code 0 on your Mac hard drive, we suggest that you install EaseUS Data Recovery Wizard for Mac to access and save the data from the unmountable hard drive to avoid losing data.

Follow the three steps to rescue your data on the unmounted hard drive:

Step 1. Launch EaseUS Data Recovery Wizard for Mac and choose the unmounting hard drive.

Step 2. Click 'Search for lost files', and the EaseUS software will show you all the recoverable files.

Step 3. Select the files you want, click 'Recover', and save them to a safe storage location.

Then, follow the 4 proven fixes below to solve the hard drive error 0:

  • ❌Fix 1. Check the Connectivity

Check the USB port and cable and ensure that the hard drive is not mounting unsuccessfully due to bad contacts. Wipe the dust from the USB port and reconnect the drive to see if it can be mounted successfully.

  • ✅Fix 2. Repair the Disk Using First Aid

The repair tool on macOS called 'First Aid' can help you check disk errors quickly and safely. Here's how to repair the disk with error code 0 using First Aid:

Step 1. Open the 'Disk Utility' and select your problematic hard drive with error code 0.

Step 2. Click 'First Aid > Run' at the top menu.

Step 3. Wait for the First Aid process to complete, and check if the hard drive can be accessed on your Mac.

  • ⚠️Fix 3. Mount the Disk Manually via Terminal

You can force-mount an external hard drive on a Mac via the Terminal command line. Follow the steps:

Step 1. Navigate to 'Finder > Applications > Utilities > Terminal'.

Step 2. Type the command line diskutil list into the Terminal window to see all drives connected to your Mac.

Step 3. Enter diskutil mount /dev/disk1s2 and press 'Enter'.

Note: Replace the disk1s2 with the name of the unmountable drive.

  • 💾Fix 4. Reformat the Unmountable Hard Drive

The last option is to reformat the unmountable hard drive to fix the ' error 0' caused by incompatibility with macOS. However, reformating a hard drive will delete all stored data on it, so make sure you create a backup before formatting.

Here are the steps:

Step 1. Navigate to 'Finder > Applications > Utilities > Disk Utility', and choose the unmountable drive.

Step 2. Click 'Erase' at the top menu, choose a new file system format and name to the formatted hard drive, and hit the 'Erase' button again.

After the erasing process is finished, you can normally use the hard drive on your Mac.

🔥Read More:

Use EaseUS Data Recovery Wizard to recover deleted or lost files easily and quickly.

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