How to Fix Bad Sectors on External Hard Drive?

February 15, 2019

This article will show you the of solution of how to fix bad sectors on external hard drive easily and effectively.

Need to fix bad sectors on external hard drive

With the popularity of large-capacity external hard drive, many users have purchased external hard drive to store large files. In addition to the quality problems of the external hard drive itself and natural aging, the usual non-standard use (ex: the memory is too small for the application software frequently accesses and reads & write to the hard disk, Fragment hard disk too frequently, Inappropriate overclocking, Power quality is not good, Low quality power supply, Too high temperature, Dust entering, etc.) can also cause damage to the hard disk. This will give inconvenience to use and make loss of important documents. In these cases, you need to fix bad sectors on the external hard drive.

How to fix bad sectors on external hard drive?

Many users may be confused about how to check and fix bad sectors on the external hard drive. And the following guide may be helpful!

Fix bad sectors with built-in tool

  • Check hard drive

First of all, you can use the Window built-in tool - CheckDisk to perform a preliminary check. CHKDSK can be used to check the integrity of a file system and bad sectors of a disk. CHKDSK also recovers the file system and the logical & physical errors of the hard disk. The specific steps for checking disk are as follows:

1. Press “Windows” + “R” to open the Run box, typing “CMD” and press “Enter”.

2. Input “chkdsk g: /f” and press “Enter”. (Here “g” is the drive letter of the disk you want to check.)

Then, you can see some information of the disk, such as disk space parameters, file size, and the number of bad sectors.

  • Repair hard drive

After that, you need to repair hard drive.

1. Double-click “Computer”, find the external hard drive you want to repair, right-click it and select “Properties”.

2. In the Properties Window, click “Tools” > “Check now…”.

3. After that, it will pop up a window, check “Automatically fix file system errors” and “Scan for and attempt recovery of bad sectors”. Click “Start” to complete these operations.

4. Wait for the system to automatically repair it.

Fix bad sectors with third party bad sector repair software

If you still cannot fix bad sectors on external hard drive after following the guide above, you can turn to a third party tool to do this operation. Here I recommend you AOMEI Partition Assistant - a professional free bad sector repair software which provides easy-to-use disk partition management. It is perfectly compatible with the current mainstream operating system like Windows 10/8/7, Windows XP, Windows Vista. You can use it to check partition and fix bad sectors easily and effectively. The specific steps are as follows:

  • Check Partition

Step 1. Download, install and run AOMEI Partition Assistant. Right click the partition you want to check and select “Advanced” > “Check Partition”.

Advanced Check Partition

Step 2. In the pop-up window, choose “Check partition for errors by using chkdsk.exe” and click “OK” to complete the operation.

Check Partition and Fix Errors

  • Check Bad Sector

Step 1.Right click the partition you want to check and select “Advanced” > “Check Partition”. The operation is same as the step 1. in check partition above.

Step 2. In the pop-up window, select the way of checking errors to perform. There are three choices, simply choose the last one “Check whether there is bad sector on the partition”. And click “OK” to continue.

Check Bad Sectors

Step 3. After that, click “Start” button to check.

Check Bad Sectors Partition


After checking the bad sector, if the external hard drive has a bad sector, you’d better backup data in advance if possible. If there are important data in the bad sector, you’d better send the hard disk to the professional data recovery center to recover the data directly. In addition, not all bad sectors can be fixed. To fix the bad sectors on external hard drive, AOMEI Partition Assistant can be the best choice. Besides Check Partition, it also has many other powerful useful functions like Resize/Move/Delete partition, Rebuild MBR, Copy Disk and so on. If you want to allocate free space from one partition to another, you can upgrade to AOMEI Partition Assistant Professional to solve this problem.