Need to Create a New Partition on a GPT Disk in Windows 10 Using Diskpart, How Can I Do?

I have Windows 10 installed on a GPT disk. What is the right way to create an additional partition to fill the unused 610 GB? Preferably using the DiskPart command line utility. There is plenty of material on the internet on converting MBR disks to GPT, but I'm struggling to find a simple example of how to add a partition to unallocated space on an existing GPT disk.

Best Answered by

Roxanne· Answered on Aug 09, 2023

In fact, the procedure for creating a new partition on the unallocated space is the same whether the disk is MBR or GPT. And this article collects a simple and complete guide for creating new partitions on an existing GPT disk via Diskpart. In addition, you will discover a time-saving alternative tool for Diskpart.

Method 1. Create a New Partition Using Diskpart

Diskpart, known as the free built-in disk tool of Windows, offers users of that operating system a variety of functions for managing disk partitions, resolving device issues, programming, and testing. You can adhere to the below steps to add a new partition via Diskpart:

Step 1. Open Command Prompt by pressing "Windows + X," 

Step 2.  Enter the following command lines individually:

  • diskpart
  • list disk
  • select disk P (Replace P with your disk number)
  • create partition logical size=2048 (change the number regarding the size you need)
  • create partition logical

Step 3. Type exit to quit Diskpart when the process is completed.

Method 2. Running EaseUS Partition Master

Diskpart is not accessible to beginners, and users will spend a lot of time typing the commands carefully because any mistake could lead to data loss. Thus, I highly recommend you use EaseUS Partition Master, an easy-to-use partition manager that enables you to add or delete partitions on existing disks. Let's see how to use this tool to create a new partition with simple steps:

Free Download 

Windows 11/10/8/7100% Secure

Step 1. Head to the "Partition Manager" part, right-click on the GPT disk's unallocated space to click "Create."

Step 2. Accept the default options or modify the partition size, drive letter, label, file system, and other advanced settings. Press "OK."

Step 3. Click "Execute 1 Task" and "Apply" to finish the disk partitioning.

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