MBR to GPT | How to Convert MBR to GPT in Windows 10 Easily and Safely

Brithny updated on Nov 18, 2019 to Partition Master | How-to Articles

Advantages of GPT Disk over MBR Disk

As Windows partition styles, both MBR (Master Boot Record) and GPT (GUID Partition Table) are widely used in storage devices like your computer hard drives. But nowadays, more and more users are changing their disks from MBR to GPT. Why? That's because there are some advantages of a GPT disk over an MBR disk:

  • Number of partitions: You can create theoretically unlimited partitions on a GPT disk while you can create at most four partitions on an MBR disk.
  • Usable space: MBR does have its limitations. MBR only works with disks up to 2 TB in size. GPT doesn’t have this limitation. 
  • Data security: MBR and GPT store the partitioning information differently and GPT uses a more advanced way, which means such information on a GPT is safer and easier to recover
  • Supported boot mode: MBR supports BIOS boot mode while GPT supports UEFI. Most importantly, UEFI is replacing the old BIOS gradually

When Do You Need to Convert MBR to GPT

Based on the advantages of GPT disks, you may want to or need to change a disk from MBR to GPT when you attempt to create more than four partitions on your disk, fully use a disk with more than 2TB of space, or install Windows on an EFI system. You may see the prompt shown as the image below telling you "Windows cannot be installed to this disk. The selected disk has an MBR partition table. On EFI system, Windows can only be installed to GPT disks" or something similar. That's because, as mentioned, MBR is compatible with BIOS while GPT is compatible with UEFI.

The selected disk has an MBR partition table

3 Ways to Convert MBR to GPT

Whether you want to change a non-boot drive from MBR to GPT without losing data or convert a boot drive from MBR to GPT during Windows installation, you will know how to do it following the details below.

Method 1. Convert MBR to GPT Without Data Loss Using EaseUS Partition Master

If you want to convert your disk from MBR to GPT directly without deleting the volumes on your disk, the optimal option for you is to use the reliable partition tool - EaseUS Partition Master. The two beneficial advantages of using this software over the Windows built-in utilities are that:

  • Unlike using Disk Management or DiskPart, you don't need to delete the partitions on the disk before the conversion, which means you can convert MBR to GPT without data loss.
  • You can create a bootable media with EaseUS Partition Master to convert MBR to GPT without operating system or during Windows installation. This is quite useful for users who realize they need to convert MBR to GPT while installing Windows.
Important
If you are going to convert a data drive, you can change it directly. However, if you are going to convert a boot disk (the disk contains your system), you need to make sure the motherboard on your computer supports the UEFI boot mode. Or you will encounter boot failure on your computer.

To convert MBR to GPT without data loss:

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 Windows 10 is supported

 

Step 1: Download and launch EaseUS Partition Master on your Windows computer. 

open EaseUS Partition Master

Step 2: Right-click the MBR disk that you want to convert and choose "Convert to GPT".

convert MBR to GPT

Step 3: After that, find and click the "Execute 1 Operation" button on the toolbar and choose "Apply" to start the conversion. You need to restart your device to enable this change. 

convert MBR to GPT

Method 2. Change MBR to GPT via Disk Management

Both Disk Management and DiskPart commands require you to delete all partitions on your disk. Thus, if there are useful files on the disk, back them up in advance. If there are lots of files on your disk, you can use the free backup software - EaseUS Todo Backup to make a backup of your files, which is much faster and effective than manually copying and pasting. To change an MBR disk to GPT in Disk Management:

Step 1. Righ-click on "This PC (in Windows 10)" and choose "Manage".

Step 2. Select "Disk Management". Right-click each partition on the disk you want to convert and choose "Delete Volume".

Step 3. After deleting all the volumes on your disk, right-click your hard drive and choose "Convert to GPT Disk".

Convert MBR to GPT using Disk Management in Windows 10

Note: Since I didn't delete all the partitions on my disk, the "Convert to GPT Disk" option is greyed out. You will see it choosable after removing the existing partitions.

Method 3. Convert MBR to GPT using DiskPart

Back up your disk and then follow the steps below to convert your MBR disk to GPT.

Step 1. Click the "Start" button and type cmd.

Step 2. Right-click "Command Prompt" and choose "Run as administrator".

Step 3. When you see a dialog box asking you for permission, click "Yes".

Step 4. Enter the following commands one by one to delete all the partitions on your disk and then convert it to GPT:

Click to copy

If you want to undo the clean command, you can use EaseUS partition recovery software to retrieve your partitions and files.

The Bottom Line

Actually, there is another Windows built-in utility to help you convert MBR to GPT without deleting data on the disk - MBR2GPT.EXE. It is only available in Windows Creator's Update and later and it's much more complicated than using the methods above. If you want to know more details, you can refer to the related Microsoft documents (https://docs.microsoft.com/en-us/windows/deployment/mbr-to-gpt) to get what you want.

 
 

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Frequently Asked Questions

Why Choose EaseUS Partition Master?

"I've used Partition Master Professional many times to create, delete, format, move, rename, and resize partitions."PCWorld

"Partitioning tools have come a very long since the days of complicated command line utilities and EASEUS Partition Master is one of the most advanced programs available."TECH ADVISOR

"I love that the changes you make with EaseUS Partition Master Free aren't immediately applied to the disks. It makes it way easier to play out what will happen after you've made all the changes."Lifewire

Will the "Migrate OS" feature transfer the Windows system files only or the whole C drive?

To ensure that the migrated system will boot normally, the Migrate OS feature will transfer all the files in the system and the boot partitions. Generally, the boot partition is the C drive so the transfer will include all the files in C.

Does EaseUS Partition Master license apply to multiple computers?

The license of Partition Master Professional and Server editions can be used on 1 computer only, while that for for the Technician and Unlimited editions can be used on multiple machines.

What is the difference between EaseUS Partition Master Trial version and the Free version?

Free is for home users only, with most basic functions available such as partition resize and clone. While trial can help you understand how this product works and test what a full license can do on a business or server OS machine.

Will it cause any data loss after resizing the partition in EaseUS Partition Master?

Generally, it will not cause any data loss or boot issue by resizing a partition. However, in order to protect your data, we suggest that you backup the partition before resizing, in case of any unexpected situations such as power outages, computer hardware failures, etc. You can use EaseUS Todo Backup to backup the partition and its trial version is fully functioned for 30 days.

What should I prepare before resizing the partition?

On the partition that is going to be operated, there might be some files being occupied by other programs. To ensure a successful operation, we suggest that you close all the unnecessary software before resizing that partition. Otherwise, EaseUS Partition Master will detect the partition being locked by the other software and require a reboot to resize the partition under boot mode.

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