EaseUS Partition Master

A simple partition tool to manage disk space in Windows 10

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

Daisy updated on Sep 10, 2020 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.

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

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.

Was This Page Helpful?

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

Was This Page Helpful

How Can We Help You

Find answers to common questions below.

EaseUS Partition Master

Manage your disk and partition with simple steps

  • User-friendly interface
  • Free technical support
  • The best disk management tool