3 Ways to Convert MBR to GPT Disk on Windows 10

Jean updated on Sep 10, 2020 to Partition Master | How-to Articles

When Do You Need to Convert MBR to GPT

Both MBR and GPT are the partition styles of Windows. Briefly speaking, the partition style is used to tell Windows how to access the data on the disk. Generally, you can use your disk smoothly regardless of what the partition style is. But there do exist some situations in which you need to convert MBR to GPT or vice versa:

  • You want more partitions on your hard drive

MBR disks support only four partition table entries. That is to say, it only allows users to create four primary partitions at most. If more partitions are wanted, a secondary structure known as an extended partition is necessary. 

  • Your hard drive is larger than 2TB

GPT (GUID Partition Table) is more robust and allows for volumes bigger than 2TB. Thus, if your hard drive is over 2TB, you may prefer the GPT partition style in order to fully use the disk space. (If the disk over 2TB uses the traditional MBR partitioning method, you can only use 2TB of storage at most.)

  • You want to perform system clone

As you may know, MBR and GPT disks use different boot mode. (MBR disks support BIOS and GPT disks support UEFI mode.) When you want to clone Windows or migrate OS, you need to make sure both the source disk and the target disk have the same partition style to ensure you can boot your computer from the target disk smoothly.

3 Ways to Convert MBR to GPT Without Data Loss in Windows 10

As mentioned, there are three ways you can apply to convert an MBR disk to GPT disk, including using Disk Management, DiskPart command, or third-party software.

Method 1. Change MBR to GPT with Reliable Partition Tool (Recommended)

If you use the Windows built-in utilities, be it Disk Management or diskPart, to convert your MBR disk to GPT disk, you need to delete all the existing volume on your hard drive. Thus, if you want to convert MBR to GPT disk without losing data, you need to back up the whole disk in advance, which could be time-consuming since a disk always stores gigabytes of files.

Given that, you are recommended to try the trustworthy partition tool - EaseUS Partition Master. This software will help you convert an MBR disk to a GPT disk directly without losing data. With EaseUS Partition Master, you don't need to delete the disk volumes as using Disk Management or DiskPart. All you need to do is to select the disk and choose "Convert to GPT".

If your disk is a data drive, you can convert it from MBR to GPT directly. However, if it's a system disk, make sure your operating system and motherboard are supported to boot from UEFI mode before converting the disk to GPT since the system GPT disk can only be booted from UEFI mode.

To convert MBR to GPT:

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 Windows 10 is supported

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

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

convert MBR to GPT - 1

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 - 2

Method 2. Convert MBR to GPT Disk with Disk Management

You need to delete all the volumes on your hard drive before the conversion, or you will see the "Convert to GPT Disk" is greyed out in Disk Management. Thus, if you have files existing on the disk you want to convert, back up all the files at the very beginning. Generally, you can back up a disk by copying files and folders manually, which will undoubtedly take a long time. If you want to make a backup effectively, you can use the free backup software - EaseUS Todo Backup, which is much faster than copying and pasting files.

After you keep your data safe, you can now follow the steps below to convert your MBR disk to GPT disk in Disk Mangement.

Step 1. Right-click on "This PC", choose "Manage", then head to "Disk Management".

Step 2. Right-click the volumes on your target disk and choose "Delete Volume..." (If you accidentally deleted a volume in Disk Management, you can recover the partition and the files on it referring to the linked article.

Step 3. When your disk becomes empty (shows as unallocated space), right-click your disk and choose "Convert to GPT Disk".

Convert MBR to GPT in Disk Management

Now you have successfully converted the MBR disk to GPT disk. In order to use the hard drive for data storage, you need to create new volumes on the disk. (If you use the EaseUS partition tool, you don't need to perform these operations. Instead, you can use it directly after the conversion.)

Step 1. Right-click the unallocated space and choose "Create New Simple Volume..."

Step 2. Then you will see the "New Simple Volume Wizard" dialog box, click "Next" to continue.

Step 3. Follow the wizard to specify volume size, assign drive letter or path, and format the partition. Afterward, a new simple volume will be created. You can repeat the process to create more partitions on the disk.

Step 4. You can copy the files you have backed up back to your disk according to your needs.

Create Volume after converting MBR to GPT disk

Method 3. Convert MBR Disk to GPT Disk Using DiskPart

DiskPart is a command-line utility in Windows that can be used to manage disk or disk partitions. Thus, you can also apply this tool to convert MBR to GPT disk. However, like using Disk Management, you are also required to delete the volumes on the disk before the conversion, which means data backup is also necessary if you prefer this method.

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 the volumes on the disk:

Click to copy

If you mistakenly cleaned a partition, you can undo DiskPart clean to retrieve your files.

Step 5. After deleting the partitions on your disk, you can now convert MBR to GPT:

Click to copy

The Bottom Line

Actually, the biggest difference between using the Windows built-in utilities and third-party software is whether to delete the disk volumes. As you can see from the details above, using EaseUS partition software, which can serve as an MBR to GPT converter, is the easiest way to change an MBR disk to a GPT disk. Besides, the tool can also help you clone disks, merge partitions, shrink partitions, migrate OS... If you want to convert a system disk from MBR to GPT, using a convenient tool is recommended. 

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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.

About EaseUS Partition Master

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Video Tutorial

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