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How to Repair Bad Sectors on External Hard Drive [Step-by-Step Guide]

This article focuses on how to repair bad sectors on external hard drive and provides step-by-step guides on the three fixes.

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Updated by Larissa on Dec 22, 2023
Written by Sherly

If you have bad sectors on your external hard drive, they may reveal a problem that could worsen over time. But what is a bad sector? Are they something we can ignore, or are they early warning signs that your external hard drive is about to die?

This article will explain what they are and guide you on how to fix and repair bad sectors on external hard drives.

Why Bad Sectors Appears on External Hard Drive

A hard disk consists of millions of sectors. A bad sector is just a small piece of storage space. Accumulating bad sectors can reduce the external hard drive lifespan. There are two kinds of bad sectors: logical bad sectors and physical bad sectors. This article focuses on fixing logical bad sectors since physical sectors can't be fixed.

With the popularity of large-capacity external hard drives, many users have purchased external hard drives to store large files. In addition to the quality problems and natural aging of the external hard drive itself, the following reasons may lead to a bad sector:

  • Dust
  • Improper use
  • High temperature
  • Poor power quality
  • Virus infection from media or computer
  • Sudden system shutdown while transferring files

As mentioned above, there are many reasons why bad sectors can appear on an external hard drive. Moreover, bad sectors on a hard drive can lead to data loss or failure. Therefore, many users would like to know how to fix or repair bad sectors on an external hard drive. Please continue reading the next paragraph to learn more.

📖Extend Reading: Check Bad Sectors on Hard Drive

Repair Bad Sectors on External Hard Drive - 3 Safe Fixes

You can try to implement a few fixes to hopefully get your external hard drive back to work. Here are some fixes showing you how to fix bad sectors on your external hard drive:

Fix 1. Repair Bad Sectors on External Hard Drive via EaseUS Partition Master

Fix 2. Repair Bad Sectors on External Hard Drive via Windows Explorer 

Fix 3. Repair Bad Sectors on External Hard Drive via CHKDSK

First, let's start with the first fix. It is the easiest one so now, let's dive into learning.

Fix 1. Repair Bad Sectors on External Hard Drive via EaseUS Partition Master

EaseUS Partition Master Professional is a useful and reliable tool for surface testing external hard drives, locating bad sectors, and repairing them. It supports all Windows versions. A clear interface and timely prompts will make the process simple and easy. Download it and try it.

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Here are the steps to do the surface test on your external hard drive and locate all the bad sectors:

Step 1. Open EaseUS Partition Master. Right-click the disk that you want to check, and then click "Surface Test".

Step 2. The operation will be immediately performed and all bad sectors will be marked as red.

After locating your bad sectors, you can use its "Check file system errors" feature to try to repair the bad sectors on your external hard drives.

Step 1. Open EaseUS Partition Master on your computer. Then, locate the disk, right-click the partition you want to check, and choose "Advanced" > "Check File System".

choose Check Partition

Step 2. In the Check File System window, keep the "Try to fix errors if found" option selected and click "Start".

check the pop-up instructions

Step 3. The software will begin checking your partition file system on your disk. When it completes, click "Finish".

finish partition check

Key Features of EaseUS Partition Master:

As a reliable disk manager, EaseUS Partition Master has a lot of features, such as:

You can download this tool to manage your external hard drives.

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Fix 2. Repair Bad Sectors on External Hard Drive via Windows Explorer

Besides, if you don't want to turn to third-party software, you can scan and repair bad sectors simultaneously in Windows Explorer. Here are the steps:

Step 1. Double-click "Computer," find the external hard disk to be repaired, and right-click and select "Properties."

Step 2. Click Tools > Check > Repair drive in the properties window.

windows explorer

Step 3. Wait for the process to finish.

During the process, you may meet some problems. Hence, there is a link for you. You can click it to learn more:

Fix 3. Repair Bad Sectors on External Hard Drive via CHKDSK

You can also use the tool that comes with Windows - CheckDisk, to perform a preliminary check and try to repair it. CHKDSK can be used to check file system integrity and disks for bad sectors. CHKDSK can recover from logical and physical errors in file systems and hard disks. The specific steps to check the external hard drive are as follows:

Step 1. Connect the target external hard drive to the PC.

Step 2. First, hit "Windows" + "R" to open the "Run" box. Then, type "CMD" and press "Enter."

Step 3. Type "chkdsk e: /f/r/x" and press "Enter". (The "e" here is the target external hard drive letter.)

chkdsk commands

Step 4. Patiently wait for it to finish.

By the way, there are two links for you to learn more about CHKDSK commands:


In this article, we have introduced three different ways to fix bad sectors on an external hard drive. But be aware that not all bad sectors can be repaired. In addition to clearing bad sectors on hard drives, EaseUS Partition Master has many other powerful and practical functions. For example, it can resize/move/delete partitions, rebuild MBR, clone disks, etc.

Hence, don't hesitate to download and try it to help.

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Repair Bad Sectors on External Hard Drive FAQs

This part lists some frequently asked questions for you. If you get similar problems, they can help. Continue to read.

1. Can a bad sector on a hard drive be repaired?

There are two types of hard disk bad sectors: physical and logical.

Physical bad sectors can be caused by physical damage, such as hard drive head-to-disk contact or overheating issues.

Logical bad sectors can be caused by malware and interrupted disk writing processes.

Physical bad sectors cannot be repaired, while logical bad sectors can be repaired.

2. Can CHKDSK fix bad sectors?

Yes, CHKDSK can scan your hard drive and provide reports only, or it can scan your disk and fix file errors or bad sectors (bad logical sectors).

3. How do I fix bad sectors on the external hard drive in Windows 10?

You have several choices to fix bad sectors. Here, I will show you one of the fixes:

Step 1. Connect the target external hard drive to a Windows PC.

Step 2. Click "This PC," locate the target drive, and right-click on it.

Step 3. Choose Properties > Tools > Check now.

Step 4. Tick the "Automatically fix file system errors" in the new window and click "Start."

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About the Author

Updated by Larissa

Larissa has rich experience in writing technical articles. After joining EaseUS, she frantically learned about data recovery, disk partitioning, data backup, and other related knowledge. Now she is able to master the relevant content proficiently and write effective step-by-step guides on computer issues.

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Written by Sherly

Sherly joined EaseUS in 2022 and she has always loved writing articles and enjoys the fun they bring. She receives professional training here, focusing on product performance and other relative knowledge. She has written over 200 articles to help people overcome computing issues.

Read full bio

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  • I love that the changes you make with EaseUS Partition Master Free aren't immediately applied to the disks. It makes it way easier to play out what will happen after you've made all the changes. I also think the overall look and feel of EaseUS Partition Master Free makes whatever you're doing with your computer's partitions easy.

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  • Partition Master Free can Resize, Move, Merge, Migrate, and Copy disks or partitions; convert to local, change label, defragment, check and explore partition; and much more. A premium upgrade adds free tech support and the ability to resize dynamic volumes.

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  • It won't hot image your drives or align them, but since it's coupled with a partition manager, it allows you do perform many tasks at once, instead of just cloning drives. You can move partitions around, resize them, defragment, and more, along with the other tools you'd expect from a cloning tool.

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