How to Partition Hard Drive Disk without Formatting

Jean updated on Dec 09, 2019 to Partition Master | How-to Articles

The methods on this page can be applied to partition hard drive in Windows 10/8.1/8/7, Windows XP/Vista. 

Why Need Partition Hard Drive

Disk partitioning is a process of dividing a hard drive into several partitions - managing the hard disk drive by shrinking, extending, deleting, creating partitions and change partition size, label, even location, etc. Why do we need to partition a hard drive? Here are the common reasons:

  • To make full use of hard drive space, splitting it into several partitions.
  • Operating System update.
  • The changes in computer and hard drive usage.
  • The change of computer users needs.

Hard drive partitions first being prepared for saving data, games, system, etc., normally, will be resized, moved, split, merged or created into new partitions in a new format or new size in Windows 10/8/7 or dual boot system.

But to partition a hard drive without formatting it is very important for some specific purposes. How to partition hard drive disk without formatting it? Here, both Disk Management and third-party partition manager software can work. 

Solution 1: Partition hard drive without formatting using EaseUS partition manager

Professional partition manager software - EaseUS Partition Master can partition a hard drive with its advanced partition operations on your hard drive without formatting it, including resize and move partitions, convert partition, split partition, merge partitions, resize dynamic disk, etc.

Moreover, EaseUS Partition Master can extend or resize partition when there is no unallocated space behind it that Disk Management can't.

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 Windows 10 is supported

See how to partition a hard drive without formatting with EaseUS Partition Master on your own:

Step 1. Create unallocated space.

Install and launch EaseUS Partition Master. Right-click on a partition and select "Resize/Move" to get unallocated space. Drag the end of the partition to leave unallocated space. 

shrink a partition

Step 2. Create a partition.

Once you have got unallocated space, you can create a partition. On the main window, right-click on the unallocated space on your hard drive, SSD or external storage device and select "Create". Set the partition size, partition label, drive letter, file system, etc. for the new partition and click "OK" to continue.

create a partition on the hard drive

Step 3. Execute operations.

Click the "Execute Operation" button at the top corner and keep all changes by clicking "Apply".

click apply to start the partitioning process

In addition, you can also apply some advanced features  as listed below to manage your hard drive in all Windows OS:

If you think this hard drive partitioning software is useful, why not apply it to manage different Windows OS partition problems with ease.

Download Now

 Windows 10 is supported

Solution 2: Partition hard drive with Disk Management

Before you start partition hard drive with Disk Management, you should first understand that it has different features in different Windows OS.

  • In Windows 10/8/7, Vista and Windows Server 2008, Disk Management can shrink volume, extend volume, shrink volume, create volume, delete the volume, format volume, etc. on a hard drive.
  • In Windows 2000/XP and Windows Server 2003, Disk Management can only create a partition, delete partition, format partition, change the drive letter on a hard drive.

So how to partition hard drive with Disk Management? Let's see:

  • Step 1: Open Disk Management
  • Right-click on This PC/My Computer > Click "Manage" > Enter Device Manager and click "Disk Management".
  • Step 2: Partition hard drive
  • Shrink partition:
  • 1. Right-click on the partition that you want to shrink and select "Shrink Volume".
    2. Adjust the partition size and "Shrink" to confirm.
  • Shrink partition with disk management
  • Extend partition:
  • 1. Shrink partition next to the target partition that you want to extend in advance.
    2. Right-click on the target partition and select "Extend Volume".
  • Extend partition with disk management
  • 3. Click "Next" to continue, add the unallocated space to extend the target partition. Click "Next" and "Finish" to complete.
  • Create partition: (formatting required)
  • 1. Right-click on the unallocated space, select "New Simple Volume".
  • Create partition with disk management
  • 2. Click "Next" to continue, set the new partition size, drive letter, file system, click "Finish".
    Wait for the formatting complete.
  • Delete partition:
  • Right-click on the partition that you want to delete, select "Delete Volume" and select "Yes".
  • Delete partition with Disk Management
  • Change drive letter:
  • 1. Right-click on the partition and select "Change Drive Letter and Paths".
    2. Click "Change" to set a new drive letter for your partition.
  • Change partition drive letter.

Although, Disk Management is capable of dealing with most simple partition management tasks. It still has cons to solve some complex problems that you'll need a third-party partition manager like EaseUS Partition Master for help:

  • It can't re-partition hard drive especially create a new partition without formatting. 
  • It can't extend system partition when the unallocated space is not behind the system partition. 
  • It has no "Move Partition" feature to move the unallocated space next to the volume which you want to extend.
  • It can't convert disk to MBR/GPT.
  • It can't convert Dynamic disk to Basic disk.

In all situations, a third party partition manager software is highly required since Disk Management has so many limitations when partitioning a hard drive. EaseUS Partition Master can always be your best choice.

Download Now

 Windows 10 is supported


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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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