Best Software to Copy Disk to another Hard Drive in Windows 10/8/7

February 9, 2018

Want to copy hard disk to another without reinstalling operating system and installed applications in Windows 10/8/7? Here you’ll find the most suitable disk copy software.

Benefit from disk copy in Windows

Speaking of hard disk copy, you may want to learn when and why need to perform disk copy, what you can benefit from disk copy.

In general, you need to copy disk to new hard drive when you find computer getting slower and slower. Absolutely you can perform a clean install and get everything re-settled. However, if you copy disk from existing hard drive to newly purchased HDD or SSD or move only OS to SSD, you would save the time of reinstalling Windows OS, configuring systems, and installing applications. Those operations are error-prone process for non-expert users.

Except for replacing Windows disk with a new one, you may need to copy game disk to external hard drive to replace disk for some Game Console. What’s more, provide same partition layout and make a backup for selected disk also need making exact copy of that disk.

How to perform disk copy in Windows 10/8/7?

In the first place, you need disk copy software to complete the task. AOMEI Partition Assistant Professional is comprehensive disk cloning tool that can help you move all data from one disk to another without losing them. Except for copying whole hard disk, the software allows you move only system drive to target disk, so that you can use SSD for OS and HDD for storage.

In the way of copying hard drive, AOMEI Partition Assistant provides two reasonable solutions: copy only used space and sector-by-sector copy. The very first method is used to copy disk to smaller drive. The last one will copy formatted or deleted partition on selected disk in the aim of recovering lost data. Let’s take a closer look. 

Two methods on disk copy 

There are two methods provided in the software: Copy Disk Quickly and Sector-by-Sector Copy. Both methods ensure data security and just need several clicks. Let's see them one by one.

The first one is also called files-by-files copy, because it only duplicates the used space of the source disk. Meanwhile, the target disk can be equal to, smaller or larger than the original hard drive, but it must be the same or larger than the used space. During the copy process, resize and move partition are available. This method takes up less time and bad sectors, if any, on the hard drive will not be copied. However, the deleted, lost files or inaccessible data cannot be copied to the target disk through this method.

Fortunately, Sector-by-Sector Copy method can solve the disadvantage of the first method, and all the sectors of the original one can be cloned, no matter whether it is used or not. Moreover, the target one must be equal or larger than the source one.

How to copy hard drive to smaller SSD in Windows 10 step by step?

Before the procedures below, we must keep some important points in mind. Here is the list:

  • When applying the operation, the data on the target disk will be wiped out. So, please backup the data on the target one.

  • It doesn't allow selecting system/dynamic/GPT/offline disk as the target one.

  • If contains system partition, the program will require to reboot the OS, so please make sure to save all the data.

Now, let's come to the steps. Here, we clone the disk 1 to disk 3 with the method of "Copy Disk Quickly" for example.

Step 1Download AOMEI Partition Assistant Professional Edition free trial. Connect the target disk to your PC and make sure it can be recognized. Then, select disk 1 and choose "Disk Copy Wizard" in the left toolbar.

Disk Copy Wizard

Step 2: Choose one of copying method to duplicate disk, Copy Disk Quickly, and click "Next".

Copy Disk Quickly

Step 3: In the pop-up window, select disk 3 and click "Next" to continue. If the disk 3 has partitions, a warning message will come out. Select "Yes" or "No" to change the condition according to personal condition. If copy to SSD, remember to tick Optimize the performance of SSD box.

Target Disk

Step 4: All the partitions present on this window, and there are three copy options. Select "Edit partitions on this disk" to resize or move partitions on new disk, then click "Next". After that, click "Finish" to go on. The other two options are also available, but cannot adjust the partitions.

Edit Disk

Step 5: Do not forget to click "Apply" and then "Proceed" to commit the task.


With the help of AOMEI Partition Assistant, disk copy can be easily completed. With the development of technology, USB drives are getting bigger and bigger. Therefore, you can copy disk to USB drive just in case system crashes one day. Also, you can copy system drive to new hard drive or SSD with AOMEI Partition Assistant and speed up your computer.