By Ailsa / Last Updated January 7, 2020


I have an Asus Ultrabook with 750GB HDD using GPT layout, Windows 8 x64. I would like to clone the whole disk to 128GB SSD. However, it is failed. I have shrunk the partitions to suitable for the SSD, I tried another cloning software to clone the UEFI/GPT-based disk to the SSD and it worked.

Unfortunately, I got an error while trying to boot from the SSD. Thus, how could I do to clone an UEFI disk to smaller SSD, and ensure the computer boot from the SSD successfully? Any suggestions would be appreciated, Thanks in advance.


GUID Partition Table (GPT) uses the UEFI (Unified Extensible Firmware Interface) to define hard disk. Master Boot Record (MBR) uses the BIOS partition table to define a disk. Thus, you have to format the system drive partition with GUID partition table file system when you deploy Windows operating system to a UEFI-based storage device. Sometimes, it is also used in some BIOS systems due to the MBR’s limitation.

The UEFI/GPT disk has the default partitions: System Partition, Microsoft Reserved Partition, Windows Partition, and Recovery Partition according to Microsoft.

Default Partitions UEFI

Brand exclusive disk cloning software

Sometimes, some hard disks will snap-in disk cloning or data migration software for users to migrate data for certain purposes. First of all, if you own the following hard drives, you have to look for the exclusive disk cloning software on the hard disk:

  • Samsung hard drive: Samsung Data Migration Software for Consumer SSD, which designed for migrate the operating system, programs, and personal files from their current hard drive to the new Samsung SSD.

  • WD hard drive: WD SmartWare or WD Anywhere backup software is available.

  • Intel hard drive: Intel ® Data Migration Software.

  • Seagate hard drive: Seagate DiscWizard software.

  • Transcend hard drive: Transcend SSD Scope software, is a disk management software and allows you to clone an entire SSD to another one. However, you might meet the Transcend SSD Scope not working for system clone issue.

However, those cloning software is not applied to other brands of hard disk, and even not for all those hard drives of the specified brands. Besides, those data migration software have some limitation to transfer when cloning, not for partition clone, file sync, etc.

Step-by-step to Clone UEFI disk to SSD in Windows 7/8/10

Therefore, how to clone UEFI disk to SSD easily? The best disk cloning software – AOMEI Backupper Professional is more flexible to use and powerful than the above mentioned cloning software and applies to Windows XP, Vista, 7, 8, 8.1, and 10. Here is how to clone UEFI/GPT disk to SSD drive (take smaller SSD for example):

1. Execute the best cloning software after installing; choose Clone -> Disk Clone in turn on the main window.

Disk Clone

2. Pitch on the UEFI/GPT disk as the source disk, and click Next.

Select Source Disk

3. Choose the smaller SSD as the destination disk at the next window, and press Next.

Select New SSD

Tip: If the UEFI disk contains more than 3 partitions, you will get a note: the source disk contains over 3 partitions. Disk Clone only supports to copy 3 partitions at most from GPT system disk to MBR (supported on the Professional version). You could convert the smaller SSD to GPT or convert the UEFI/GPT disk to MBR, and then try it again.

4. Preview the operation to cloning UEFI/GPT disk to SSD, and check Align partition to optimize for SSD, and then press Start Clone.

Clone UEFI Disk to SSD


  • Edit partitions: you could tick Add unused space to all partitions or maually adjust partition size. If needed, please upgrade to AOMEI Backupper Professional.

  • Sector by sector clone: if you tick this option, you have to prepare a SSD larger than the UEFI disk.

  • Align partition to optimize for SSD: this option will quicken the reading and writing speed for your SSD drive.

After that, you could change the original UEFI/GPT hard disk with the smaller SSD, and then enter Boot Manager to set the smaller SSD as the first boot device, and finally boot your computer normally.

Besides, this powerful software allows you to clone hard disk to larger SSD, clone 128GB SSD to 256GB SSD, make exact copy of hard drive, etc. You can also enjoy system clone, command line utility, restore to dissimilar hardware computer, etc.