Repair the failed Mac hard disk or SSD If you are very lucky your hard drive (or SSD) isn't beyond repair and you will be able to fix the problem yourself and therefore get access to your files.

An external hard drive is used to store your photos, videos, important documents and other data which are rarely used. However, there are situations when your computer does not read or does not recognize an external hard drive. In this case, the first thing you need to figure out what happened to it.

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External HDD loss reasons

For starters, you need to know what could lead to the loss of files on an external hard drive. This information will help you to avoid such situations in the future.

• Power failure.

A sudden power failure can cause all external hard drives to malfunction.

• Damage by a virus or other malware.

In this situation, your data is not damaged; it is simply encrypted. Often for the return of your files, hackers demand money. Do not be fooled by this trick; use external drive repair software. It is safe and faster.

• Manufacturing defects.

Even reputable manufacturers sometimes produce defective external hard drives. And this spoilage is most often detected in the first year of using the device. Therefore, the first year, it is best to store backups of data in another safe place as well.

• Mechanical damage.

Without going into details, on the external hard drive there are at least two fragile parts: the head and the air filter. Damage to the head is often associated with careless use of a storage device, as, for example, when you throw a hard disk onto a bed. If the air filter passes particles of dust, this in turn will damage the head and it will stop working correctly.

• Using an external hard drive in extreme conditions.

Temperatures above 60 degrees Celsius can lead to a malfunction of the electronic board. This will break the entire hard disk. And, what is worse, no external hard drive repair software will help you to recover data.

Resume: Check for physical damage on your external hard drive. If this is the case, then you just have to take it to the service center. If this is a logistical error, such as deleting, formatting or losing a hard disk partition, then everything is much simpler. External hard drive repair software will help you to recover an external hard drive.

DiskInternals Partition Recovery is the best software to repair an external hard drive. This software works on each of the sections on the hard disk.

It will restore files of absolutely any type, and there are no restrictions on the volumes of documents being restored. All recovered files can be saved on any drives (including network drives) visible to the host operating system. The easy-to-use Recovery Wizard will help you at all stages of restoring an external hard drive. DiskInternals Partition Recovery allows you to recover and view all your recovered documents for free before saving. You just need to download this application and you will learn more about the many advantages of DiskInternals Partition Recovery.

A quick step-by-step guide for external hard disk repair tool on Windows 7:

1. 1. Download and run DiskInternals Partition Recovery external hard drive repair software.

1. 2. Select the appropriate location to scan.
2. 3. Scan the hard disk. It will take some time.
3. 4. Preview and restore hard disk partitions. After reviewing all the recovered documents, you will be sure that they are restored.

1. 5. Preservation. For this action, you need to purchase a license and enter the license key. It is better not to save the recovered documents in their original location.

Check & repair external hard drive errors with Windows

You can also try built-in Windows tools at first to check and fix the hard disk error. If you succeed, you can easily access your data. See below for instructions on how to do this.

1. 1. Open this computer, then right-click on the external hard drive you want to check, and click the Properties button.
2. 2. Then click Tools, then Check.
3. 3. You will see a new window, “Check disk parameters”. Select one of the options to check and repair the hard disk. Then click Start.

As a result of the whole process, your external hard disk or hard disk partition should work correctly. Now try to access the stored documents on an external storage device.

No luck? Try to repair external hard drive with the command line

You can use the command line as an external hard drive repair tool, as it is very good at fixing your file system and storage. But if you need to restore any data from a damaged external hard drive, it is not enough. The command line will reduce your data to 512 KB, so this is not the best option. Therefore, this method should be used only after saving data from the device.

To use the command line, press the key combination ⊞ Win and X / Win (depending on the Windows version). You can also click the Start button.

Then enter “cmd” in the search field and press Enter. A new cmd.exe window will appear.

Click on it; you will see a line similar to this:

Then enter chkdsk [the drive letter]: parameter f or parameter r and press Enter.

It will look like this:

Note: d - is an example of diskis letter and there is a space between “d:” and “/”.

For reference:

- corrects errors on the external hard disk.

- corrects the sector on external the hard disk.

The scan of your external hard drive begins. This external HDD repair tool is unpredictable, but the file system needs to be fixed.

We hope you choose the right external hdd repair tool and you will not regret your choice. Good luck!

Summary: This is a guide to fix external hard drive corrupted issue for you, and it talks about how to recover lost data from a corrupted external drive and iBoysoft Data Recovery for Mac, the best corrupted external hard drive data recovery software.

What is corrupt hard drive on Mac?

Hard drive corruption on Mac is a drive failure of mounting, accessing, or reading on Mac, which frequently happens to external hard drives and USB flash drives. It's because they are usually used to back up a large amount of data or to extend the capacity of Mac.

A corrupted external hard drive will look like this: the Mac computer won't recognize the external hard drive when you plug it into the USB port, and the hard drive will not be automatically mounted and you can't access data on this drive. Sometimes, the Mac would return an error message like 'The disk you inserted is not readable' to report a hard drive corrupttion. Once that happens, you will lose access to the files stored on the corrupted external hard drive. It's such an annoyance especially when you don't have a copy of data backup while data on this external hard drive is especially important to you.

Don't worry. Let's check out the crux of external hard drive corruption and learn how to fix or repair corrupted external hard drives on Mac in case of losing any significant data.

External Hard Drive Repair Mac

Why you external hard drives is corrupted?

There are various reasons leading to external hard drives corruption, including drives sharing among different platforms, faulty connection, unsafe ejection, interruption during transferring files, hardware malfunction and virus infection, etc.

Don't know which is the troublemaker of your external hard drive corruption like this user?

Hello, I have a problem with my external hard drive. When I plug it into my Mac, it takes too long to acknowledge the drive and files can't be opened at all. I tried to reformat my external hard drive but it says reformat unsuccessful. Any suggestion on how to fix corrupted external hard drives on Mac?

Check the following fixes one by one and you will work it out.

How to fix/repair corrupted external hard drives on Mac?

Solution 1: Check if your drive is properly plugged in

Even though it sounds foolish, it could troubleshoot your corrupted external hard drive. Simply plug your external hard drive slowly or quickly into the USB port and see if you can access this drive.

Solution 2: Check if it is a faulty connection

Since the external hard drive is connected through the USB cable and port, it could be corrupted due to a wobbly connection. You can just connect your external hard drive to another USB port or USB cable.

Solution 3: Fix/repair the corrupted external hard drive with Disk Utility

If the connection is not supposed to be blamed and you sure your external hard drive has no hardware problems, it could be a minor file system corruption which could be fixed through Disk Utility. Disk Utility is a built-in utility on Mac to verify and fix basic external hard drives errors, such as multiple apps quit unexpectedly on Mac computer, a file is corrupted, an external device is corrupted or doesn't work properly, or your computer won't start up, etc.

1. Go to Utilities > Disk Utility.

2. Select the corrupted external hard drive from the sidebar.

3. Click First Aid on the top of Disk Utility window. It may take a while to fix the errors.

Solution 4: Fix/repair the corrupted external hard drive by reformatting

Mac Hard Disk Repair

If Disk Utility failed to fix the corrupted external hard drive for you, the file system of your external hard drive could be seriously corrupted and need to be reformatted with a new file system. In some ways, reformatting is able to fix your external drive corruption issue but from another perspective, reformatting will erase the disk and you will lose your important data. Fortunately, there is a tool called iBoysoft Data Recovery for Mac that can recover your data firstly before you reformat this corrupted external hard drive. It's a risk-free way to fix the corrupted external hard drive and you don't have to worry about data loss any more.

iBoysoft Data Recovery for Mac is free and reliable Mac data recovery software that can recover lost data from corrupted external hard drives and recover lost data from formatted/unreadable/unrecognizable external hard drives. Moreover, this useful tool can undelete files from Trash, recover lost/deleted APFS partition and recover lost data from hard drives, USB flash drive, memory cards, pen drives, etc. It is compatible with macOS 10.15/10.14/10.13/10.12 and Mac OS X 10.11/10.10/10.9/10.8/10.7.

Follow the steps below to fix the corrupted external hard drive.

Step 1: Recover lost data from the corrupted external hard drive with iBoysoft Data Recovery for Mac.

1. Download and install iBoysoft Data Recovery for Mac on your Mac computer.

2. Connect the corrupted external hard drive to your Mac and launch iBoysoft Data Recovery for Mac.

3. Select the corrupted drive and click 'Next' to scan for all the lost files.

4. Double-click to preview the scanning results and choose files you want to get back.

Disk Repair Software For Mac

5. Click 'Recover' and save them to another well-functioned drive.

6. Check the recovered files and make sure all the lost files have been restored successfully.

Step 2: Fix the corrupted external hard drive by reformatting.

After successfully recovering data from the corrupted external hard drive, you can fix it by reformatting now.

1. Launch Disk Utility.

2. Select the corrupted external hard drive from the sidebar of the window.

3. Click the Erase button on the top of Disk Utility window.

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

Conclusion

Best Hard Drive Repair Software

To avoid losing data from corrupted external hard drive, you'd better do yourself a huge favor and make sure your backup strategy is up and running and foolproof. A little pain now will save you a world of hurt in the future. If you have already lost data because of external hard drive corruption, without wishing to pour salt in the wound, recover the lost data with iBoysoft Data Recovery for Mac software for good.