How to Add Unallocated Space to D Drive in Windows 10/8/7

Updated By

Linda 

Written By

Tracy King 

Last Updated on April 22, 2024

Get a quick grasp of what you need to prepare to add unallocated space to Drive D:

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What is unallocated space?

Computers allocate space on hard drives in contiguous sectors or clusters. When you create a new file, the operating system finds available space and assigns it to the file. Unallocated space, also referred to as "free space," refers to areas on the hard drive that haven't been assigned to active files within the file system. In other words, unallocated space can only be used for storing data and files once it's assigned to a drive on your computer.

Usually, unallocated space is invisible on your computer. You can view the unallocated space in Disk Management on your Windows 10/8/7 PC. In this article, we'll show you how to add unallocated space to Drive D. Actually, this page is also helpful if you want to add unallocated space to other drives.

Check unallocated space

How to add unallocated space to Drive D: Here's a step-by-step guide on how to allocate unassigned disk space to Drive D in Windows using the built-in Disk Management tool: 1. **Open Disk Management:** - Press `Windows key + X` and choose "Disk Management" from the menu. - Alternatively, search for "Create and format hard disk partitions" in the Start menu, then select "Disk Management" from the search results. 2. **Identify Unallocated Space:** - In the Disk Management window, look for the unallocated space (usually shown in black). It should be next to an existing partition. 3. **Shrink an Adjacent Partition (if needed):** - If the unallocated space is not contiguous with Drive D, you'll need to shrink another partition to create room. Right-click on the partition adjacent to Drive D and choose "Shrink Volume." Enter the amount of space you want to shrink by, then click "Shrink." 4. **Extend Drive D:** - Now that you have unallocated space next to Drive D, right-click on Drive D and select "Extend Volume." - In the Extend Volume Wizard, follow the default settings and click "Next" until the process is complete. 5. **Confirm Changes:** - After the operation, the unallocated space should now be part of Drive D. Check the new drive layout to ensure the space has been added correctly. Please note that this process may take some time depending on the size of the unallocated space and your system's performance. Also, make sure to save all your work before proceeding as these operations involve modifying the disk structure.

On Windows 10/8/7 PCs, users have three options to extend D drive with unallocated space: a professional partition manager, Disk Management, and the DiskPart CMD command. However, these three methods require users to possess varying levels of partition knowledge. Let's examine each method in turn.

1. Tools Partition Master - The Easiest to Use

This method is the simplest. You don't need much knowledge about partitioning, just a professional partition manager. All operations can be completed with the help of this tool. Here we recommend using AOMEI Partition Assistant Professional, which specializes in disk partition management. Whether the unallocated space is adjacent or not, you can directly extend the unallocated space to Disk D, C, or other disks.

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Please download Partition Master and follow the guide below to learn how to add unallocated space to D drive in 3 steps.

Step 1. Select the partition that is next to the unallocated space, and choose "Resize/Move".

Step 2: Hover the mouse over the partition and drag it left or right to move the unallocated space.

You can repeat Steps 1 and 2 to move unallocated space to where you want it.

Hit “Proceed” and then “Apply”, and it will perform the operation to add the unallocated space to the target partition.

You can also watch this video tutorial to learn how to more easily expand Drive D or another drive.

If you find this approach helpful, please share it with those around you and tackle this task with ease, just like an expert.

Here are some features of the Partition Master tool that you might like regarding managing partition size and disk performance:

• Supports resizing, moving, creating, formatting, and deleting partitions for users.
• Enables users to convert from MBR to GPT and vice versa without data loss.
• Allows users to migrate the operating system to an SSD for faster Windows performance.
• Recovers deleted or lost partitions by scanning the entire disk or unallocated space.

2. Disk Management - Moderate

You can also try using the Disk Management utility on your computer to add unallocated space to a partition. This method is best for more experienced users, so it might be a little difficult. Don't worry, though – follow the step-by-step guide below to add the unallocated space to your target drive.

Step 1: Right-click "This PC" and select "Manage." Click on "Disk Management" to open it.

Step 2: Right-click the partition you want to manage and select "Extend Volume".

Click “Next” to continue adjusting the unallocated space, and add it to the selected partition.

Step 4: Click “Next” and then “Finish” to complete the installation process.

3. Using the DiskPart Command Prompt - Difficult

For tech-savvy users, they can manage unallocated space with DiskPart CMD. Here are the detailed steps.

Step 1. Open the DiskPart command prompt:

Search for CMD, right-click “Command Prompt,” and select “Run as administrator.” Type diskpart, and press Enter.

Step 2. Enter the following commands in order, pressing Enter after each one:

• **list disk** • **select disk 0** (replace 0 with the number of your disk) • **list volume** • **select volume D** (replace D with the number of the partition you want to extend) • **extend size=number** (adjust and add unallocated space in MB to the selected volume)

Step 3: Type exit to close the Disk Utility.

Now you can check if the unallocated space has been added to Drive D:.

Additional tip: Create a new partition using unallocated space

In addition to resizing existing partitions, you can also create new ones using unallocated space. tools Partition Master provides a simple method for doing this. Continue reading to find out how to create a new partition with tools Partition Master.

Step 1. Launch AOMEI Partition Assistant. On the main interface, right-click on the "Unallocated" space on the hard drive or external storage device and select "Create".

Step 2. Adjust the size of the new partition, the file system (choose a filesystem as needed), label, etc., and click OK to proceed.

Step 3. Click the Run 1 Task button and then create a new partition by clicking Apply.

Watch the following video tutorial to learn how to create partitions on an NTFS, FAT, or EXT file system.

Bottom line

That's all about how to add unallocated space to D drive. You can choose anyone of the three methods based on your needs. As you see, Partition Assistant always provides you with a quick and easy experience in partition management. Besides allocating free space, you can also use it to convert primary partition to logical, merge two partitions, and create a bootable WinPE disk. Download the software to have a try right now.

Frequently Asked Questions on Adding Unallocated Space to D Drive in UTF-8 Encoding

Here, we've gathered some popular topics about allocating unallocated space on a Windows PC. Feel free to continue reading to find the answers you're looking for:

**1. Can I extend Drive D using unallocated space?**

Certainly, you can extend Partition D using the unallocated space on your computer. You can apply any of the provided methods - Partition Master, Disk Management, or DiskPart, whichever suits you best.

2. How to extend D drive without unallocated space?

When you don't have unallocated space on your PC and want to extend D drive, you can try either of the following two methods:

Option 1: You can create unallocated space on your computer by shrinking a large partition that has plenty of free space. Then, you can use the unallocated space to extend Drive D.

Option 2: You can use the Partition Master tool along with its "Allocate Space" feature to directly assign and add the unallocated free space from the large volume to the target D drive in just a few simple steps. For a step-by-step guide, refer to the instructions on this page: How to allocate a hard drive.

< strong > 3. Can I recover an unallocated partition?

Of course, when your partition becomes unallocated, it might be due to deletion, virus, or other reasons. To recover unallocated partition, you can directly use the Partition Master tool with the “Partition Recovery” feature to help. For the detailed guide, please refer to this page: Recover Unallocated Partition.