Best MBR Repair Tool For External Hard Drive| Free Download

October 18, 2018

External drive MBR get damaged? Take it easy now! Here we’re going to present you the best free MBR repair tool for external hard drive-AOMEI Partition Assistant. With it, you can easily fix your corrupted MBR.

MBR on external hard drive get damaged!

“I have a 1 TB HDD which I am running from an external dock. it doesn't show up in windows explorer, so I checked it with a third party partition manager and it shows as an unallocated space, but it won't allow me to make any changes to it. No formatting or anything. The program says the MBR is damaged and needs to be fixed. How can I do that? Is there any MBR repair too for external hard drive?”

I believe most computer users have experienced corrupted MBR (Master Boot Record) on external or internal hard drive.

When the MBR on external hard drive gets damaged, you will not be able to access to any partition of that disk, nor the data stored within that drive. When your internal hard drive suffers from a corrupt MBR, you are usually not able to start Windows. Instead, after the BIOS screen, an error message such as “Invalid Partition Table”, “Operating System Not Found” or “Missing Operating System” will appear.

Therefore, you might wonder what causes the MBR damage of external or internal hard drive.

Possible causes for corrupted MBR of external drive

When it comes to the causes for corrupted MBR of external drive, the following three main reasons are worth of your extra attention.

  • A virus infection: most viruses are most likely to target the master boot record because it is the most important part of your hard drive.

  • A drive failure:when the area of the hard drive where the MBR is located has some defective clusters, then the MBR might become unreadable.

  • An MBR overwrite: some programs or apps you download from Internet might accidently overwrite the part of MBR, and then make it corrupted.

Best MBR repair tool for external hard drive-AOMEI Partition Assistant

Now, back to the point- is there any professional MBR repair tool to fix damaged master boot record? Actually, when you Google online, many free MBR repair tools or solutions will come into your sight. Among them, the most popular one probably is to run the bootrec.exe/fixmbr command in the Command Prompt window. However, it might not be considered as a wise choice for the common computer users without enough IT knowledge.

Alternatively, things will become much easier if you turn to a free MBR repair tool! AOMEI Partition Assistant is a strong recommendation since it comes with a feature named Rebuild MBR. This powerful function could help you easily and quickly repair the corrupted MBR of both external or internal hard drive in Windows 7/8/10/XP/Vista. All you have to do is to download the free partition manager on a normal computer and repair MBR with a few clicks.

  • Repair MBR on external hard drive in Windows 10 instruction:

1.  Connect the external drive of which MBR is corrupted to a normal computer where AOMEI Partition Assistant is installed.

2.  Launch the freeware. Right click the external disk and select Rebuild MBR.

Rebuild MBR

3.  Select the type of MBR for your current operating system.

MBR Type

4.  Click Apply->Proceed to execute the pending operations.

Repair MBR

5.  In the pop-up confirming dialogue, click Yes, and wait for the process being completed.

What’s more, you can also use this tool to check hard drive error after MBR repair to avoid further damage.


So, next time when you get corrupted MBR on a hard drive, external hard drive and USB flash drive, no need to worry. With the great MBR repair tool for external hard drive –AOMEI Partition Assistant, you can easily repair with damaged MBR in both external and internal hard drive.

When you want to repair the MBR of internal disk, you will need to first create a bootable media with that freeware, and then fix it in the WinPE mode. If you are eager to experience more advanced functions like command line operations, you can upgrade it to AOMEI Partition Assistant Professional version.