By Bryce / Last Updated May 8, 2018

Can I clone GPT disk to MBR SSD successfully?

“I have a Lenovo computer running Windows 10 that is installed on a GPT HDD. I want to replace the old HDD with my newly purchased SSD to improve my booting speed and I’m unwilling to reinstall Windows and other applications. I realized that I can transfer all data from disk to another by disk copy. But is it available to clone GPT HDD to MBR SSD and boot from the MBR disk without failure? Is there any advice? Thanks a lot!”

Great Disk cloning software: Clone GPT to MBR disk

When you need to clone GPT disk to another disk, it is recommended to turn to a reliable disk cloning software. Here this reliable and powerful disk cloning software – AOMEI Partition Assistant Standard can be your first choice. With intuitive and concise interface, it is easy to handle even for newbie in computer. It allows you to clone GPT disk to MBR disk easily and securely in Windows 10/8/7, XP and Vista. Besides, it can help you to migrate OS from GPT disk to MBR using the function – Migrate OS to SSD, if you upgrade it to Professional version. After realizing AOMEI Partition Assistant, it is time to know how to clone GPT hard drive to MRB SSD/HDD using this disk cloning software.

How to clone GPT disk to MBR without boot failure?

Before starting cloning GPT to MBR disk, you should know something presented as follows:

  • All data on destination MBR disk will be overwritten, thus it is advised to backup important data on the MBR disk before cloning.

  • If you need to clone GPT hard drive whose used space is over 2TB to MBR disk, you can convert MBR disk to GPT in Windows at first as MBR partition style supports up to 2TB hard drive.

  • If the GPT disk owns more than 4 primary partitions, you can merge partitions or delete partitions to decrease partition number as MBR disk supports up to 4 primary partitions or 3 primary partitions and one extended partition.

  • GPT disk works with Extensible Firmware Interface (EFI) or the Unified EFI (UFEI) while MBR disk works with simple firmware Basic Input/Output System (BIOS). Thus, to boot computer successfully, you should change boot mode to BIOS after switching from GPT disk to MBR disk.

Let’s have a closer look at how to clone GPT disk to MBR using AOMEI Partition Assistant.

Step 1. Connect the MBR SSD to your computer and ensure that it can be detected by operating system. Then, download and install AOMEI Partition Assistant.

Step 2. Run AOMEI Partition Assistant. In the main interface right click the GPT disk choose “Disk Copy” to select it as you source disk.

Clone GPT Disk to MBR

Step 3. In Disk Copy Wizard window, choose "Copy Disk Quickly" among two copy methods and click "Next".

Copy Disk Quickly

  • It allows you clone GPT HDD to smaller MBR SSD if the size of the used space on the HDD is not larger than the capacity of SSD.

  • If you choose Sector-by-Sector Copy, the MBR disk will be converted to GPT before cloning.

Step 4. Choose the MBR disk as your destination disk. If it is SSD, tick the box of "Optimize the performance of SSD" to align SSD partitions. Then click "Next".

Select the MBR Disk as the Destination Disk

Step 5. Here you can adjustthepartition size on the MBR disk. Then, click “Next” to continue.

Edit Disk

PS.: The option of “Copy without resizing partitions” will be grayed out when the size of destination disk is smaller than the size of source disk.

You’ll be informed of how to boot from the destination disk after cloning. Read it and keep it in mind. Then, click “Finish”.

Note about How to Boot Operating System

Step 6. You’ll return to the main interface. Click “Apply”>“Proceed” to execute your operation.

Apply Proceed

Note: This process will be completed under PreOS mode and your computer will restart. Therefore, it is recommended to save everything you are editing before cloning.

After cloning, reboot your computer and press certain key (usually, F2 or Del) to enter BIOS to change boot priority to the cloned MBR disk and switch from UEFI to Legacy. Before you boot successfully from the cloned disk, it is not advised to format or wipe your original GPT hard drive.


Obviously, you can clone GPT disk to MBR without boot failure under this great disk cloning software – AOMEI Partition Assistant. It can help you to clone MBR disk to GPT as well. In fact, apart from disk copy and OS migration, as comprehensive software, AOMEI Partition is featured with many other functions to manage your disk in Windows 10/8/7, XP and Vista. For example, it is able to format external hard drive to various file systems, including NTFS, FAT32, exFAT, Ext2, Ext3 and Ext4; it can also delete, resize and create partition on your disk.