By Bryce / Last Updated September 29, 2021

Can I clone Windows 10 to smaller SSD?

“I’m intending to upgrade my hard disk drive with Windows 10 installed to solid-state drive. As I’m unwilling to reinstall Windows 10 operating system, I decided to migrate it by cloning. The problem is that the capacity of the HDD is 1TB and the newly purchased SSD is 256GB. Is it possible to clone Windows 10 HDD to smaller SSD?”

Great cloning software for Windows 10

Due to SSDs’ various merits like faster speed and high price, it is wiz to upgrade Windows HDD to smaller SSD. And you can avoid the trouble of reinstalling Windows 10 by cloning HDD to a smaller SSD. In fact, it is a rather simple task to clone Windows 10 disk to smaller, if the used space on the target disk is not larger than the capacity of the destination SSD and you employ proper disk cloning software.

AOMEI Partition Assistant Professional is just the right one; it offers two ways to copy disk: "Sector-by-Sector Clone" and "Clone Disk Quickly". The latter one only copies used space on the source disk to destination one, allowing you to clone Windows 10 HDD to a smaller SSD if the used space on the HDD is not larger than the capacity of SSD. What's more, if the destination disk is not large enough to hold all the data on the source HDD, it supports you to migrate only OS-related partitions (data partition not included) to smaller SSD as well via Migrate OS to SSD function.

AOMEI Partition Assistant Professional can not only work with Windows 10, but also with Windows 11/8.1/8/7, XP, and Vista. If you need to clone Windows Server 2019/2016/2012 (R2)/2008 (R2) to SSD, you can employ AOMEI Partition Assistant Server.

5 Steps to clone Windows 10 to smaller SSD

To clone Windows 10 HDD to a smaller SSD, connect the target SSD to your computer well at first; then, install and run AOMEI Partition Assistant Professional.

PS.: You can free download the demo version of AOMEI Partition Assistant Professional to have a try!

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

Step 1. In the main interface of AOMEI Partition Assistant Professional, click “Disk Clone Wizard” and choose "Clone Disk Quickly". Then, click “Next” button.

Copy Method

Step 2. Choose the Windows 10 HDD as the source disk and click “Next”.

Source Disk

Step 3. Choose the smaller SSD as the destination disk. Then, hit “Next”.

Target Disk

Step 4. Here you can adjust the partition size on the destination SSD. As the SSD is smaller than HDD, the first option is greyed out.

Edit Disk

A Note about how to boot from cloned disk (here is disk 2) will prompt. Read and remember it.

Boot Note

Step 5. Go back to the main interface. Check the operation and click “Apply” to execute it.


After moving Windows 10 HDD to smaller SSD by cloning, if you want to keep old HDD and boot from SSD, you need to enter BIOS to change boot priority to SSD. If you clone GPT disk to smaller MBR SSD or MBR disk to GPT SSD, you also need to change boot mode between Legacy and UEFI.

Change Legacy to UEFI


With the help of AOMEI Partition Assistant, you can clone Windows 10 to smaller SSD easily and safely. In fact, it is more than disk cloning software for Windows 10/8.1/8/7, XP, and Vista. It enjoys many other functions like converting dynamic disk into basic without data loss, resizing system partition, creating Windows bootable USB drive, recovering lost partition, etc.