By Emily / Last Updated October 28, 2021

Need to transfer OS to new hard drive

You may want to move Windows operating system to new HDD or SSD out of different reasons:

After years of usage, the available storage space of your hard drive can decrease and trigger the low disk space issue. It’s not a bad choice to move OS to a large disk and use the old one as a secondary device.

The Windows operating system is installed on a hard disk drive (HDD) and you want use SSD for OS and HDD for storage when an SSD is available.

The system hard drive is about to fail due to overload, service time limitation, virus, or other unknown reasons. Moving OS to new hard drive from the old one helps you avoid reinstalling operating system and personal applications.

Another important reason of migrating Windows OS is to save time and effort of reinstalling and re-configuring systems and applications which are required in a clean instalkl. To transfer OS to new drive with the help of OS migration software, you can keep system files and personal data intact.

Whatever reasons in your mind, next step is to figure out how to move your OS to new SSD or HDD

Employ an OS migration software for Windows 11, 10, 8, 7

For some files and folders, such as the Documents, Music, Photos, or Videos folder, you can drag and drop them to new hard drive in Windows Explorer. However, it is not wise to just drag and drop Windows OS-related files to the new drive because it won’t be bootable afterwards.

Thus, here we would like to introduce a secure and effective OS migration software for Windows 11/10/8/7(32/64-bit) – AOMEI Partition Assistant Standard. Its "Migrate OS to SSD Wizard" can copy all OS-related files and all other applications & files stored on system partition from your old hard drive to the new one. After cloning, you can boot OS successfully from the new hard drive. What’s more, if you want to transfer all data from one hard drive to another even when the target disk is smaller, you can use Disk Clone Wizard built-in AOMEI Partition Assistant Standard.

Transfer OS to new hard drive step by step

Now, free download this tool and check out the detailed steps.

Download Freeware Win 11/10/8.1/8/7/XP
Secure Download

▸The Standard version supports migrate OS from MBR to MBR disk. To transfer Windows OS from MBR to GPT for Windows 11, please turn to AOMEI Partition Assistant Professional.

Step 1. Connect the new SSD or HDD to your computer. To transfer laptop OS to new hard drive, you may need a SATA-USB adapter.

Sata to USB

Step 2. Install and open Partition Assistant Standard. Click Migrate OS to SSD in the left pane. Don’t be confused by its name because it can apply to HDD as well.

Migrate Os To Ssd

Step 3. Choose the new hard drive here as the target disk. If there is partition on SSD, check “I want to delete all partitions on the disk 2 to migrate system to the disk” and make “Next” available.

Select Disk Space

Step 4. You can drag the double-headed arrow to resize system partition or just type the desired number in the box below.

Resize Partition

Make sure to read the Note in this window.


Step 5. Click Apply and Proceed to execute the pending operations.



This operation involves system partition, which requires it to be completed under PreOS mode.

To boot from the new hard drive, you need to set it as the first boot device in BIOS. Press F10 to save changes and exit.

To transfer Server OS to new hard drive, you can switch to the Server edition.


Either to transfer OS to new hard drive out of upgrading old disk or out of replacing the failing one, AOMEI Partition Assistant Standard just let your hassle away. In the meantime, it helps you to manage partitions conveniently and overall. Basic partition operations, like Resize/Move Partition, Merge Partitions, Clone Disk/Partitions, Create/Format/Delete Partition, Split Partition, etc are provided by it.