By Teresa / Last Updated February 19, 2019

Why migrate only OS to SSD?

Generally, there are two main reasons to explain that why people want to move only OS to SSD from HDD or another SSD. First of all, the improving of operating system is good enough for him or her. Maybe he or she just wants to keep OS separately running with other installed software. This group of user who uses SSD for OS only normally has fewer requirements for PC configuration and doesn’t install large-sized games there.

The other one mostly comes from objective factor, the limitation of SSD size. Even though SSDs come with larger capacity and more affordable prices, it is still far away from the needs of people’s daily use, the one who installed large software in particular. Therefore, to migrate OS to SSD from HDD while keeping files on HDD is an inevitable decision they have to make.

How to migrate only OS drive to SSD?

Traditional tools in Windows may fail its users in this field. If you insist on using Windows internal tools to move OS to SSD, try backing up system (create a system image) and then restoring the image on SSD. Remove HDD to test if it works fine and then format previous system partition under Windows PE mode.

You may think about third party cloning software as well. As a matter of fact, the success of this migration depends on the system state on your hard drive. Most of them offers disk clone, which will move everything from the old hard drive to new SSD. This is no different to back up disk and restore the image.

Fortunately, some professional partition managers like AOMEI Partition Assistant Professional has the function to solve the puzzle of how to migrate OS to SSD from HDD while keeping files on HDD as titled at very beginning. It allows you to resize the system partition on the SSD before migrating, which would be very useful if you have other plans for the SSD. Considering that the destination disk is SSD, this software will automatically align system partition to optimize for SSD during the migration. More importantly, AOMEI Partition Assistant ensures successful booting from the target disk SSD. So, what are you waiting for?

Migrate OS to SSD but keep files on HDD via Partition Assistant

First of all, install the SSD to your PC. Then install and boot AOMEI Partition Assistant. Click Migrate OS to SSD in the left pane. Read the forewords.

Migrate OS to SSD

Second, select an unallcoated space on SSD and then clcik Next. If there is no unllocated space on the SSD, you can check "I want to delete all partitions on disk 2 to mgirate system to the disk (all data on SSD will be erased)" and then click Next.

Select Space on SSD

Third, change the system partition size to your desire value.

Resize Partition

Fourth, pay attention to the Note here. It may be useful later.


Fifth, confirm the virtual result. If everything’s fine, click Apply to execute it.


Note: This migration will move the entire C drive to SSD. However, the personal files you created on other partitions like E drive will not be moved and stay on the HDD.

How do you migrate OS to SSD from HDD while keeping files on HDD? Obviously, AOMEI Partition Assistant answers this question quite well. Easy steps and graphical interface, there is no excuse of denying such a helpful migrating tool. Speaking of helpful, you can use it to create bootable Windows to go USB drive, make Sandisk USB bootable, for example. It can be used to resize partitions, merge partitions, so it will be handy when you want to extend system drive into non-contiguous space. The transmission between GPT and MBR, NTFS and FAT32, logical and primary are available, too.