By Teresa / Last Updated December 24, 2019

Reasons to clone an external hard drive to another

Cloning a hard drive helps a lot in people’s life. On the one hand, cloning a hard drive prevent stored contents from losing, including installed programs and personal files. This has the same effect of backup and it saves the steps of restoring. On the other hand, it can help you realize data migration.

For example, clone bootable hard drive to external in hard drive upgrading or replacing. Sometimes, we’ll use external hard drive as bootable device just in case the PC breakdown and cannot boot one day. If you find the hard drive is about to fail, it is a wise move to clone external hard drive to another external hard drive and boot from the new one.

There are still many other factors that lead us to clone external drive to external drive are not listed in this article. You may have learned lots of tutorials on cloning internal HDD to external hard drive in Windows. Then have you figure out the solution of cloning external drive?

How to clone an external hard drive to another in Windows?

As mentioned many times in my other articles, Windows currently misses this cloning feature in its all Windows versions. If you stored only files like movies, photos or documents and just want to make a duplication for these data, you can refers to backup external hard drive to another external hard drive for more information. As usual, to perform cloning-related operation, you have to turn to powerful free third-party cloning tool like AOMEI Backupper Standard.

This external hard drive cloning software provides a function named “Disk Clone” which will help you complete cloning covers bootable and non-bootable external hard drive in Windows 10, 8, 7, XP and Windows Vista. In addition, it is acceptable if the destination external drive is smaller than the source because you can clone only used part on the source drive. It is user-friendly and you may want to free download it to have a try.

Download Freeware

Clone external hard drive to another external disk in Windows 10

Install these two external hard drives to your PC and make sure they can be detected by Windows. It is important that you know which disk is the source external drive because all data on the destination external drive will be overwritten during this process.

Then, clone external hard drive using the following steps:

1. Install and launch AOMEI Backupper Standard. Go Clone > Disk Clone.

Disk Clone

2. Select the source external drive.

Source Disk

3. Select the destination external drive.

Destination Disk

4. If the target external drive is an SSD, check SSD Alignment box to improve the performance. Then click Start Clone.

Start Clone

5. You can Edit Partitions yet if you clone the external drive sector by sector, you’ll make this option invalid.

Edit Partitions


  • When cloning external drive to smaller external drive, the smaller one should no smaller than the used part of source drive.

  • The options with a “PRO” rearward you see in this software means you need to upgrade to AOMEI Backupper Professional to unlock them.

In conclusion, you can clone external hard drive to another external hard drive in only four steps with the help of free AOMEI Backupper in Windows. AOMEI Backupper is not only a professional cloning tool but also a reliable backup solution. You can take it as File History alternative just like many others did. For Windows Server users, this has to be completed with AOMEI Backupper Server or higher.