By Bryce / Last Updated October 24, 2019

Need to replace hard drive with larger one

After using computer for several time, you may find out that the capacity of the original hard drive cannot satisfy the increasing data storage demand. And you can fact the issues like Low Disk Space warning error, applications respond slowly, etc.

You can try to delete data or uninstall some applications to free up disk space on the hard drive to fix the issue. But if you want to solve the problem effectively, you can choose to replace your small disk with a larger one.

Replace disk without OS reinstallation: clone hard drive to larger drive

When comes to replacing old disk and using new drive as boot device, the first idea that occurs to you might be the time-wasting and energy-consuming Windows and application reinstallation.

In fact, you don’t have to suffer from the complicated reinstallation process, if you choose to clone your current small hard drive to a larger one. Trough cloning disk, all data including OS can be duplicated to the larger drive. After that, you can boot Windows from the cloned larger disk.

How to: clone hard drive to larger one (step-by-step)

As aforementioned, you can manage to replace hard drive without reinstalling through disk cloning. Actually, disk cloning can also be applied when you need to protect your important data stored on the original disk. Then, how to clone a hard drive in Windows?

Here you can turn to trusted and powerful hard drive cloning software – AOMEI Partition Assistant Professional. It allows you to clone hard drive to another one of different sizes (larger, equal or smaller) in Windows 7/8/10. Besides, if you clone hard drive to larger SSD, it can make 4K alignment for SSD to improve performance. Now, have a closer look at how it works:

Step 1. To clone hard drive to larger drive, connect the new larger drive to your computer. Install and run AOMEI Partition Assistant Professional.

PS.: It’s available to download its demo version and have a try at first!

Step 2. In the main interface, go to All Tools and Disk Clone Wizard. It will pop up a window where you can choose a way to clone to a larger drive.

Copy Wizard


Step 3. In the window like the following screenshot, you need to select the smaller disk as your source disk.

Source Disk

Step 4. Choose the larger disk as your destination drive. If the drive is SSD, tick the box before Optimize the performance of SSD to align SSD partitions.

Target One

Step 5. Here you can adjust partition size on the destination drive.


PS.: If you clone hard drive to smaller SSD, the option Copy without resizing partitions will be greyed out.

You’ll be prompted by a note about how to boot from the cloned disk after cloning, read it and keep it in mind.


Step 6. You’ll return to the main interface. Click Apply and Proceed to commit operation.



  • If you clone MBR system disk to GPT or Versa vice, you need to enter BIOS to change boot mode, so that you can boot from the cloned hard drive successfully.

  • All the data on the destination disk will be overwritten; you can make a backup using AOMEI Backupper before cloning, if there are important files on it.

  • AOMEI Partition Assistant Professional can work well with Windows 10/8.1/8/7, XP and Vista. To clone disk to disk in Windows Server, you can employ AOMEI Partition Assistant Server.

Wrap things up

Whether you want to clone hard drive to larger drive or smaller drive, AOMEI Partition Assistant Professional can be very helpful. And it comes with various other functions as well, such as migrate OS to SSD, convert disk between MBR and GPT without data loss and so on.