While it’s useful to have different partitions on your hard drive for different uses, sometimes you’ll need to merge them into one contiguous unit. Whatever your reason, you are here because you are looking to merge multiple partitions of your computer into a single unit, preferably without any data loss. So, today we are going to show you how to combine (merge) multiple hard drive partitions into a single unit in Windows 10 computers using an inbuilt Windows tool called “Disk Management”, a third-party application called AOMEI Partition Assistant and via ‘DiskPart’ command line tool (command prompt or cmd).

Merge Multiple Hard Drive Partitions in Windows 10

Windows 10 offers a built-in partition manager utility called disk management which can be used to merge or combine multiple partitions. However, you can also use third-party tools and even use command prompt (cmd) to merge disk partitions in Windows 10. There are different pros and cons for each method, and here we will tell you exactly which method is suitable for you. what objective. So, without further ado, let’s see the various methods by which you can combine (merge) multiple partitions into a single contiguous unit and extend an existing partition in Windows 10.

Things to remember before merging partitions on Windows

You can easily partition your hard drive or SSD using a built-in Windows tool called Disk Management. It can perform basic tasks such as deleting, formatting, and creating new volumes, all of which are needed to manage a PC’s storage structure. However, there is no real “merge” functionality in Disk Management. Instead, one can increase the size of a partition (volume) by adding adjacent unallocated space on the right. Another major disadvantage of Disk Management tool is that you have to delete all data from the additional space to be able to merge it with other partitions.

Along with Disk Management, we will also use a third-party Disk Management tool to merge or combine two partitions. Most of these applications allow you to add nonadjacent Unallocated space to create a large contiguous volume without losing data. For the most part, they also have better user interfaces and are easier to use for general users. There are many partition manager software available for Windows, including EaseUS Partition Master, MiniTool Partition Wizard, Paragon Partition Manager, AOMEI Partition Assistant and others. Almost all of them support the “Merge” function. Finally, we will also learn how to use the command line tool, DiskPart, to merge partitions on Windows computer.

That said, let’s see how to merge multiple partitions into one in Windows 10:

Method 1: Using Disk Management (Data Loss)

This method will cause you to lose the data, so create a full backup of Windows 10 before continuing with this method.

  • Go to Control Panel and search for “Disk Management”. From the results, click on “Create and format hard disk partitions”.

To note: You can also open Disk Management via Run > diskmgmt.msc.

  • Locate the two partitions you want to merge, then delete the right one. For example, to merge/combine drive D: and E: on my PC, I would first need to delete drive E:. To do this, right-click on the E: partition and select “Delete Volume”.
  • You will receive a warning that all data will be lost. Click “Yes” to continue.
  • Now right click on volume D: and click “Extend Volume”.
  • Now you will see the “Extend Volume Wizard” which will let you choose how much you want to extend the disk. Click “Next” to start the process.
  • Accept the default options and click “next” without changing any of the values.
  • Finally, click “Finish” to completely merge two partitions into one.
  • As you can see, I managed to merge (combine) the D: and E: partitions into one on my Windows 10 PC.

Method 2: Using Third-Party App (Without Data Loss)

To note: We use AOMEI Partition Assistant for this demo, but most of the other programs in our list, including the ones mentioned above, support the “merge” feature..

  • First, download and install AOMEI Partition Assistant (To free). Now open it and right click on the partition whose size you want to increase. From the context menu, choose “merge partitions”.
  • Now choose the partition you want to add to the parent partition [1] and select volume label [2]. Finally, click “OK”.
  • Now you have successfully merged two partitions in Windows 10 without losing data.

Method 3: Using DiskPart (Data Loss)

You can also use command line tool (cmd), DiskPart, to merge two partitions in Windows 10. Here is how to do it:

  • Type “diskpart.exe” (without quotes) in the Windows search bar and press Enter.
  • In the command line window that appears, type ‘list volume’ and press Enter
  • Now type ‘select volume’ (without quotes) and hit enter. For example, “select volume e” if E: is the partition you want to merge.
  • Type “delete volume” to make this volume ready for merging.
  • Now select the partition you want to extend. To do this, type ‘select volume’ to move the focus to this volume. In this case, I’m going to type “select volume d” and hit enter.
  • Finally, type ‘extend’ to extend this partition. You should get the message “DiskPart successfully extended volume”.

That’s it. Your D: drive and your E: drive are now one contiguous unit.

Easily merge hard drive partitions on your Windows 10 computer

Now you know how to merge or combine partitions on your Windows 10 computer using built-in Disk Management tool, command line (DiskPart), as well as using third-party applications like AOMEI Partition Assistant without lose data. Meanwhile, since you are already interested in partition management, you should also check how to convert your hard disk partition style from MBR to GPT. You should also peruse our detailed explainer on the difference between BIOS and UEFI for a more holistic understanding of how your computer works under the hood.