How to Resize EFI System Partition on Windows 10/8/7

Daisy updated on Jul 29, 2020 to Partition Master | How-to Articles

EFI System Partition Too Small

"How do you make the EFI partition on your system bigger without losing data? My EFI is 99MB large, and I need it to be at least 200MB so that I can install Mac on this PC. I already have Windows 10 installed. The built-in Windows 10 Disk Management tool won't allow me to operate on the EFI partition because the extend volume option is grayed out."

how to resize efi partition size

The EFI system partition (ESP) is a partition on a data storage device, usually an HDD or SSD that is used by computers adhering to the Unified Extensive Firmware (UEFI). ESP contains the bootloaders or kernel images for all installed operating systems, so users are not allowed to operate on such a partition easily. However, sometimes resizing EFI partition is demanded. Now it's significant to have a partition manager program that can help realize the goal, meanwhile, with a simple solution.

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 Windows 10 is supported

Download EaseUS Partition Master to Extend or Shrink EFI Partition

To meet the huge demand of being able to resize EFI partition freely in the Windows operating system, EaseUS Partition Master is lately optimized and the new version now fully supports operation on EFI system partition. Click to learn in detail about the newest partition magic software that gives you the best experience to deal with your hard drive partitions, including the EFI partition, system partition, system reserved partition, and OEM partition.

How to resize EFI partition with EaseUS Partition Master

Make sure that the EFI partition is on a GPT disk. If not, convert MBR disk to GTP disk before any further operation. After that, you can resize your partition by shrinking or extending it. The guide below will show you how to resize or move a partition, and you can apply the steps to resize your EFI partition on a GPT disk.

Video tutorial:

Step-by-step guide:


Step 1: Download EaseUS Partition Master and install it. After that, launch EaseUS Partition Master. Right-click the partition, and choose "Resize/Move".

select resize/move

Step 2: Resize the GPT drive.

#1. To Extend Partition:

If there is unallocated space on the disk, drag the partition handle to add the unallocated space into the GPT disk partition. Click "OK" to confirm.

resize the gpt partition

If there is no unallocated space, click "Advanced Settings" and select another partition to allocate free space into the target GPT partition. Drag the GPT disk partition handle leftward or rightward to extend it and click "OK" to confirm. 

extend the gpt partition

#2. To Shrink Partition

On the Resize/move pop-up window, drag the handle of the GPT partition to shrink its size. Or, you can also adjust the "Partition size" option to shrink it. Click "OK" to confirm. 

srhink the gpt partition

Step 3: Apply the pending operation to resize the GPT partition.

apply the operation to resize gpt partition
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 Windows 10 is supported

How to Identify EFI Partition in Windows 10

By resizing the EFI system partition with EaseUS Partition Master, you easily solve the problem of EFI system partition too small to hold important boot files or Windows installation. Though it's possible to manage the EFI partition size by either shrinking, moving, or extending, do you know how to identify the EFI partition in Windows 10?

If you have a basic understanding of BIOS and UEFI (EFI), you'll surely know how to check, find and determine whether you are using it or not.

Method 1. As a practical matter, EFI partitions are found on GPT formatted drives and are used to boot the operating system. Although the UEFI spec and the GPT partitioning scheme are independent of one another, Windows requires that you use them together. You cannot boot Windows from an MBR formatted disk on a UEFI system, and you cannot boot from a GPT disk on a legacy BIOS system. That's how you should know how your system is configured.

identify uefi partition

Method 2. Go and check in the system information window. Type MSInfo32in the Run box and open the window. Find the "BIOS Mode". If your PC uses BIOS, it will display Legacy. If it is using UEFI so it will display UEFI.

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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

All-round disk & partition management software for personal and commercial use. Let it manage your storage drive: resize, format, delete, clone, convert, etc.

Video Tutorial

How to Partititon a Hard Drive on Windows 10/8/7