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How to Move Unallocated Space to C Drive in Windows 10/11 [Step-by-Step Guide]

Updated by Sherly on Nov 03, 2022

Can we move unallocated space to C drive? Sure, you can. Unallocated space is blank disc space, not showing up in the File Explorer, which does not belong to any partition and can be used by the user to extend another partition or create a new volume. In most cases, users may want to use the unallocated space to extend another partition. This article will detail three ways to move unallocated space to C drive, so just continue to read. But before that, we need to figure out why we need to move unallocated space to c drive.

Why Move Unallocated Space to C Drive?

The C drive is the storage location where the operating system is installed. And many programs are installed by default on the C drive. Therefore, the reasons why move unallocated space to C drive are as follows:

  • Free up space on C drive
  • Make it easy to create personal files
  • Keep programs on C drive running properly

Many temporary files or caches are also generated with daily use. Then the C drive can easily fill up and show a red bar in Windows File Explorer. To make matters worse, the user will receive a warning occasionally that the disk is running out of space. In this case, it is essential to move the unallocated space to your C drive and make it bigger. 

You may also like to know:

However, how to move unallocated space to C drive? You can learn three ways in the next part.

Three Efficient Ways to Move Unallocated Space to C Drive

Transferring unallocated space to the C drive is a good way to expand the system drive so that you can install more apps and programs there and keep others running properly. In this part, there are three ways to move unallocated space to C drive. The ways are as follows:

Way 1. Move Unallocated Space to C Drive with EaseUS Partition Master

Way 2. Move Unallocated Space to C Drive with Disk Management

Way 3. Move Unallocated Space to C Drive with Diskpart

There is a table to help you choose a suitable way to move unallocated space to C drive. It is clear that EaseUS Partition Master is easier to use, isn't it?

Features EaseUS Partition Master Disk Management Diskpart
Operation Difficulty Easy

Medium

Difficult
Safety Safe Safe Apt to make a mistake
Interface Clear with prompts Kind of clear Complex
Function Unlimited Limited Limited

There is one thing we need to tell you. You might find "Extend Volume" grayed out in Disk Management, and you might see "Diskpart failed to extend the volume error" happen in Diskpart, which is because the unallocated space you choose is not adjacent to the C drive on the righthand. In this circumstance, you may need your nice helper, EaseUS Partition Master Professional. This tool can help you move the unallocated storage space next to your C drive. Well, now, let's use EaseUS Partition Master to start moving unallocated space next to C drive.

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Step 1. Select the partition next to the unallocated space, select "Resize/Move".

resize unallocated space

Step 2. Put the mouse on the partition and drag it to the left or right to move the unallocated space.

resize unallocated space 2

You can repeat Step 1 and 2 to move the unallocated space to the desired location.

Move unallocated space to a desired position

Step 3. Click "Execute Task" and "Apply", it will execute the operations to add the unallocated space into the target partition eventually.

resize unallocated space 5

Well, after moving the unallocated storage space next to your C drive, let's start transferring unallocated space to the C drive. Of course, you don't have to move the unallocated space next to the C drive in advance if you are moving the unallocated space to the C drive with EaseUS Partition Master.

Way 1. Move Unallocated Space to C Drive with EaseUS Partition Master

EaseUS Partition Master is a professional disk management tool for Windows users. It supports almost every version of Windows, so don't worry about compatibility. EaseUS Partition Master helps you assign unallocated space to any side of the partition. It is easy to use, and you are sure to like its clear interface. Now, download EaseUS Partition Master and follow these steps to move unallocated space to C drive.

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Step 1. Locate the Target Partition.

Go to Partition Manager, locate the target partition and select "Resize/Move".

Select target partition to extend

Step 2. Extend the Target Partition.

Drag the partition panel rightward or leftward to add the unallocated space into your current partition and click "OK" to confirm.

choose another drive to allocate space

Extra Option: Get Space from Another Drive

If there is not enough unallocated space on your disk, right-click on a big partition with enough free space, select "Allocate space".

Then select the target partition that you want to extend at the allocate space to column.

choose another drive to allocate space

Step 3. Execute Operations to Extend Partition.

Drag the dots of the target partition into the unallocated space and click "OK".

finish extending partition

Then Click the "Execute Task" button and click "Apply" to keep all the changes. 

Besides moving unallocated space to C drive, does EaseUS Partition Master help with other issues? Of course. Let's learn more about it in the next part.

What Can EaseUS Partition Master Do?

As a professional and efficient disk manager, EaseUS Partition Master can help with many problems. Its specific features are as follows:

Well, if you are tired of these disk management or are not an expert in computing, you will enjoy downloading EaseUS Partition Master. It can free you from these irritating disk management issues.

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Windows 11/10/8/7100% Secure

Way 2. Move Unallocated Space to C Drive with Disk Management

Microsoft has retained the Windows Disk Management utility tool in Windows 10/11, so users can use it to add unallocated space to the C drive. Follow these steps to perform this action.

Notice:
This method is only suitable when the unallocated space is righthand of the C drive.

Step 1. Hit the Windows key + R at the same time to launch Disk Management via the "Run" window.

Step 2. Then, type the following command and click OK:

diskmgmt.msc

Step 3. Once you launch Disk Management, right-click on the C drive. Then, select "Extend Volume" to extend your C drive.

disk management extend c drive

Way 3. Move Unallocated Space to C Drive with Diskpart

As we have mentioned, you can also use Diskpart to move unallocated space to the C drive. Let's learn how to perform this action.

Notice:
This method is only suitable when the unallocated space is righthand of the C drive.

Step 1. Hit Windows + R key to open the "Run" option. Type diskpart and hit Enter. Run it as administrator.

Step 2. Then, hit Enter every time you type a command below:

  • list volume
  • select disk x (Replace x with the correct number)
  • list volume
  • select volume c (Replace c with the correct partition number)
  • extend size=10240 (Change 10240 with the quantity you want to extend)
  • exit

Then, you have moved your allocated space to the C drive via Diskpart.

Besides, we prepare some links for you if you meet problems, like:

Conclusion

These are the three ways how to move your allocated space to C drive. But Diskpart and Disk Management can only work when your unallocated space is adjacent to your C drive on the right side. Therefore, if your unallocated space is separately distributed on the drive, EaseUS Partition Master is a nice choice. You will like it. Well, if you get other questions, the next part may help you.

FAQs About Move Unallocated Space to C Drive

Do you know how to move unallocated space to your C drive now? This part list three other questions related to moving or transferring unallocated space to the C drive. Hope it can help.

1. How do I move unallocated space next to C drive?

You can try a third-party disk software, EaseUS Partition Master. It can help move the unallocated space next to the C drive, and after that, you can add the space to the C drive.

2. Why can't I add unallocated space to C drive?

That may be because the unallocated space you choose is not adjacent to the C drive on the righthand. You can use a third-party tool to move your unallocated space to the C drive.

3. How do I merge unallocated space to the C drive in Windows 10?

You can use Windows 10 built-in tool, Disk Management, to help. Now, follow these steps:

  • Step 1. Install and launch Disk Management. 
  • Step 2. Right-click the targeted partition you want to add your unallocated space to and then select the "Extend Volume" option to merge partitions.
  • Step 3. Follow the Wizard and then click "Finish."

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About the Author

Updated by Sherly

Sherly joined EaseUS in 2022 and she has always loved writing articles and enjoys the fun they bring. She receives professional training here, focusing on product performance and other relative knowledge.

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