```|---add---December 23, 2014 / Posted by AOMEI|---update---By AOMEI / Last Updated July 16, 2019|---default---By AOMEI / Last Updated July 16, 2019|```

When do we need to clone disk?

At some point, you intend to repalce hard drive with an SSD or a new hard drive, and to transfer Operating System hard drive is especially a headache. On the other hand, if you fresh install the OS on the new drive, you must reinstall all the software and set up your personal configurations once again. What’s worse, if you have not backed up activation information of your purchased software, you may have to reactivate them again. It will be a disaster if you lose the activation keys. Applications installed on the old drive will fail to run on new one because of the lack of old Windows registry. In this case, the best way to solve the problem is to clone the boot disk to your new drive without reinstalling Windows or installed applications.

Free hard drive cloning software

As an all-in-one free partition manager, AOMEI Partition Assistant Standard can help you make an identical copy of your hard drive, including the Operating System, applications, personal configurations and data.

What's more, this disk clone software can not only support opy disk quickly but also sector-by-sector copy. You can choose the appropriate method to clone disk based on your needs. Compared with the two methods, each has both advantages. Copy disk quickly method, also called file-by-file copy, can only clone the used space of the source disk to a new hard drive, but it is much faster than the other because it only clone files. However, sector-by-sector copy method allows you to clone all the sectors of the source disk to a target hard drive no matter whether it is used or not. What's better, the deleted, lost files or inaccessible data only can be cloned with sector-by-sector copy. Once the cloning operation is complete, you can recover the files from the target disk with data recovery software.

How to clone hard drive?

To clone a hard drive to SSD or another hard drive is very easy with AOMEI Partition Assistant. It allows you to clone large disk to a small one, which is very helpful for people want to upgrade hard drive with an SSD. Before you do, you must understand that all data on target disk will be erased after you apply the operation.

To copy hard drive with AOMEI Partition Assistant:

1. Free download this software, install and launch it.

2. Right click the source disk (Disk 1) and choose "Copy Disk".

Select Source

3. Choose the default “Copy Disk Quickly” and click “Next”.

Copy Quickly

4. In the next screen, select the destination disk. If it is an SSD you are copying to, check the "Optimize the performance of SSD" option.

Select Disk2

5. In the next screen, you can adjust the partition size of the destination disk. When that is done, click “Next” to continue.


6. Preview the partition layout after editing the partition size. Then click "Apply" to start to clone hard drive.


With the help of AOMEI Partition Assistant, you can clone disk without the need to reinstall the operating system and applications when you switch hard drives. If only want to transfer OS to another disk, you can use the Migrate OS to SSD feature.