By Bryce / Last Updated June 16, 2021

Need to upgrade to a larger SSD

“With more and more applications and data saved on my current 128 SSD, the capacity of it is not enough. Thus, I have purchased a 256GB Samsung SSD and intend to replace 128GB SSD with it. To save the time of kinds of programs and Windows 10 operating system, I want to clone 128GB to 256GB SSD. Is there any detailed guide? How can I perform this task without failure?”

Employ reliable and powerful cloning software

By cloning 128GB SSD, you can get a copy of it on destination SSD, thus you can perform SSD drive upgrade without reinstallation. To clone SSD that contains Windows with secure boot, it is important to use proper cloning software.

Here AOMEI Partition Assistant Standard, compatible with Windows 10/8.1/8/7, XP, and Vista, will be your great choice. Its Disk Clone Wizard can not only clone entire current SSD (including hidden partitions) to new large SSD freely and securely but also clone large HDD to smaller SSD (e.g. clone 1TB HDD to 500GB SSD). And its user-friendly and concise graphic makes it very easy to operate.

Detailed tutorial on copying 128GB SSD to 256GB SSD

Before SSD to SSD clone operation:

▪ Install the new 256GB SSD to your computer. If you need to clone SSD on a laptop, a USB-to-SATA adapter might be necessary.
▪ If there is any important data on the target SSD, back up them in advance.
▪ Free download, install and run AOMEI Partition Assistant Standard.

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

Step 1. In the main interface, go to All Tools > Disk Clone Wizard. In the pop-up window, choose one copy method based on your situation.


▪ Clone Disk Quickly – only used space will be copied, demanding the capacity of the target disk not be smaller than the used space of the source disk. If you need to clone to a smaller drive or complete disk copy quickly, choose this way.

Sector-by-Sector Clone – every sector whether it is used or not will be cloned, requiring that the size of the destination disk not smaller than the size of the source disk.

Step 2. Choose the old 128GB SSD as your source disk and click Next button.

Source Disk

Step 3. Select the new 256GB SSD as your destination disk, check “Optimize the performance of SSD” and then click Next.

Target Disk

Step 4. Here you can modify partitions on the destination disk or you can leave it alone and resize partition after cloning.


Step 5. Back to the main interface, click Apply and Proceed to commit operation.


To boot from cloned SSD in success, you can shut down your computer, replace old SSD with cloned SSD, or change boot order in BIOS.
 When it comes to cloning system SSD, AOMEI Partition Assistant supports only MBR to MBR; for cloning MBR system to GPT or GPT to MBR/GPT, you need to upgrade to Professional version.
 All the above steps about how to clone the current 128GB SSD to the new 256GB SSD can be applied to clone 128GB to 500GB, clone 256GB to 500GB, and so on.


Whether you want to clone SSD to larger SSD or clone HDD to smaller SSD, you can turn to AOMEI Partition Assistant. Apart from cloning the whole disk, it can copy specific data partition or migrating OS drive, satisfying different cloning requirements. What’s more, it is very helpful in managing partitions. It enables you to extend C drive with non-contiguous unallocated space, convert NTFS to FAT32 without data loss and convert MBR into GPT without deleting, etc.