How to Merge Partitions on Windows 11/10/8/7 and Server Safely

1. Merge partition on Windows 11/10/8/7/Vista/XP with Free Software

Merging two or several partitions without losing data would be an easy and safe job to perform by IM-Magic Partition Resizer which is 100% free software on Windows 11/10/8/7/Vista/XP, the PC platform. As an outstanding partition manager to merge partitions, it can do the job flawlessly.

Why you need Partition Resizer (100% Free)

• Windows does not provide such merging function for disk volumes when users need to convert two partitions or more into one partition
• Partition Resizer is 100% freeware on Windows PC Win11/10/8/7 etc.  Windows Server users may need a cost for its Partition Resizer Server edition.
• 100% safe to use. It employees a Roll-Back Technology that it wont make any damage to your PC if there were expected power failure and you may cancel the merge at will if you change your mind in the process of merging.

[Video1] How to Merge C and E Partitions into One

Note: When the system partition is involved in the process, partitions can only be merged into the system partition.

[Video4] Merge Several Partitions Back into One

Please note that you need to merge two adjacent partitions one by one first in this procedure. If the system recovery partition is involved in this process, please back up the entire OS disk first using IM-Magic Partition Resizer, which offers an OS migration wizard and disk copy functionality for user convenience.

The system restore function will be disabled if you move, delete, or merge the recovery partition into another partition. It can only remain functional if you clone the entire disk to another disk. (IM-Magic Partition Resizer offers disk cloning.)

Also read: How to merge all partitions one

[Video2] Merge Partitions with Unallocated Space

[Video3] Merge Partitions with/without a Recovery Partition

Note: Moving or changing the location of the recovery partition may disable system restoration. Please back up your disk first if possible. Usually, Windows will create a new recovery partition when enforcing a new OS update.

Merge Partitions with Step by Step Guide

Step one: start the Resizer and then right select the C system volume and then allocate its ‘Merge Partition’

Step two: select the partitions you want to merge, ie select c and H and then set the location of merging to get all partitions merged to C volume

Step three: apply the changes by confirming yes and you will see its notice of power off to get merging started.

It only takes a few minutes for the merging and everything will be done perfectly. Then open the software to see its big C system volume, or you may open your ‘My Computer’ and see you already have a large C drive. Then C is successfully merged with its neighborhood drive.

2. Merge Partitions on Windows Server 2012/2016/2019/2022/2025

Windows Server is a group of operating systems released by Microsoft. Its first edition was Windows Server 2003. Windows Server supports RAID volume, which is quite popular.

If your system is running Windows Server, you can merge partitions easily using IM-Magic Partition Resizer Server.

Download IM-Magic Partition Resizer Server

Steps are the same as the instructions for other Windows versions mentioned above. Below are additional notes and considerations specific to Windows Server systems:

It is a common problem that your computer's performance slows down over time. This often happens because the capacity of your hard disk drive becomes tight, which affects the overall operation of your system. To improve your system's performance, it might be necessary to extend disk space by merging partitions.

Tips for Merging Partitions Safely:

• Always backup your important data before performing partition operations.
• Ensure sufficient power supply to avoid interruptions during the process.
• Check the health of the disk using built-in tools like CHKDSK or third-party utilities before proceeding.

By following these steps and tips, you can efficiently merge partitions on all supported Windows Server versions, including Windows Server 2012, 2016, 2019, 2022, and even 2025.

3. Merge Partitions in Disk Management or Using Diskpart CMD

Neither Disk Management nor Diskpart CMD offer a direct option to merge partitions. These tools can only extend existing partitions when adjacent unallocated space is available. For example, you can extend an NTFS volume into unallocated space that is directly next to it, but you cannot combine two separate partitions into one.

To merge partitions using these built-in utilities, you would first need to delete one partition to free up space, then extend the remaining partition into the unallocated space. However, this process can lead to data loss, so it is crucial to back up any important data before proceeding.

If you need to combine partitions without losing data, third-party partition management software, such as IM-Magic Partition Resizer, can be used to safely merge partitions without deleting data.

Here's a quick overview of what you can do with these tools:

• Disk Management: You can extend an NTFS partition into unallocated space, but merging two partitions is not possible.
• Diskpart CMD: Similarly, Diskpart allows you to extend volumes but doesn't support partition merging. It also requires you to first delete one of the partitions before extending the other into the free space.

Steps for Extending a Partition Using Disk Management

1. Open Disk Management by right-clicking the Start menu and selecting Disk Management.
2. Right-click the partition you want to extend (make sure it’s an NTFS partition) and select Extend Volume.
3. In the Extend Volume Wizard, select the amount of unallocated space to add to the partition.

Steps for Extending a Partition Using Diskpart CMD

1. Open Command Prompt as Administrator by pressing Win + X and selecting Command Prompt (Admin).
2. Type diskpart and press Enter.
3. Type list disk to see all disks connected to your computer.
4. Select the disk containing the partition you want to extend: select disk X (replace X with the disk number).
5. Type list partition to view all partitions on the selected disk.
6. Select the partition to extend: select partition Y (replace Y with the partition number).
7. Type extend to extend the partition into adjacent unallocated space.
8. Type exit to leave Diskpart.

Example Diskpart Code:

diskpart
list disk
select disk 0    # Replace with your disk number
list partition
select partition 1    # Replace with the partition number you want to extend
extend              # Extend into adjacent unallocated space
exit

Important: This method does not merge partitions, but it will extend an existing partition into the unallocated space next to it. If you need to merge partitions, you will have to delete one partition and then extend the other, which can lead to data loss if not backed up.

Alternative: Use Third-Party Software for Merging Partitions

If you need to merge partitions without data loss, third-party partition management software is recommended like IM-Magic Partition Resizer which allows for more flexibility, including merging partitions without deleting data.