How to Increase C Drive Space in Windows 11/10 Without Losing Data

The C drive typically stores operating system files and default programs. If your C drive is almost full, the PC boot and operating performance may be affected. In addition, the Windows update may fail and apps may crash.

Fortunately, you can extend C drive using Disk Management, DiskPart, or MiniTool Partition Wizard. Which tool is better suited for you? That depends on your disk partition layout.

Disk Management and DiskPart can only extend C drive with unallocated space that is immediately adjacent to the right of the C drive.

However, they can’t extend C drive in the following cases.

• The unallocated space is not next to the C drive.
• The unallocated space is to the left of the C drive.
• There is no unallocated space on the disk and the C: drive needs to take space from drive D or drive E.

In these cases, you need to use MiniTool Partition Wizard Free.

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Method 1. Extend C Drive via Disk Management

Disk Management is a built-in Windows utility. Here is how to increase C drive space using it.

Step 1: Right-click the Start icon and then hit Disk Management on the prompted menu.

Step 2: Right-click the C drive and select Extend Volume.

Step 3: Hit Next to move on.

Step 4: Select the amount of disk space to add by typing the specific number. Then click the Next button.

Step 5: Tap on the Finish button to save changes and execute the operation.

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Method 2. Extend C Drive via DiskPart

DiskPart is a Windows command-line utility that enables you to run various disk-related tasks by executing corresponding commands.

To extend the C drive with this tool, follow the guide below.

Step 1: Open the Run window by holding the Windows and R keys.

Step 2: Type diskpart in the Run window and press the Ctrl + Shift + Enter keys.

Step 3: In the UAC (User Account Control) window, click Yes to continue.

Step 4: In the DiskPart window, type the following commands in order and hit Enter after each.

• list disk
• select disk 0 (Replace 0 with the number of the disk that contains the C drive)
• list partition
• select partition 3 (Replace 3 with the partition number of the C drive)
• extend (This will take all the unallocated space adjacent to the C drive. To take the desired amount of free space, type extend size=x; x refers to the size in MB used to extend to the C drive.)
• exit

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Method 3. Extend C Drive via MiniTool Partition Wizard

MiniTool Partition Wizard offers an Extend Partition feature, which can extend the C drive with free space in an existing partition or unallocated space located on the same disk.

In addition, this all-in-one disk and partition manager can also create/format/delete partitions, move/resize partitions, split/merge partitions, copy partitions/disks, migrate OS, recover lost partitions/data, convert MBR to GPT, delete duplicate files, etc.

How to extend C drive in Windows 11/10 using this software? Here are the steps.

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Step 1: Launch MiniTool Partition Wizard to enter its main interface.

Step 2: Right-click the C drive and hit the Extend option.

Step 3: Take free space and click OK to save changes.

1. Open the Take Free Space from drop-down menu and select a partition or unallocated space.
2. Move the blue slider to decide the amount of space to take.
3. Hit the OK button.

Step 4: Tap on Apply > Yes to execute the operation. Once done, the result will be displayed as follows.

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Other Methods to Increase C Drive Space

There are other ways to resolve the C drive full issue besides extending the partition. For example:

• Free up disk space on the C drive by deleting unnecessary files, running disk cleanup, uninstalling apps, disabling some Windows features, etc.
• Upgrading the system disk to a larger one.

How to Prevent the C Drive from Filling Up Again

Extending the C drive provides more storage, but the drive can become full again if Windows, apps, and personal files continue accumulating. To keep enough free space on the C drive, you can:

• Enable Storage Sense to let Windows automatically remove temporary files and other unnecessary data.
• Clean up temporary files regularly.
• Uninstall unused apps and games.
• Move large personal files to another drive or external storage.
• Change the default save location to another drive.
• Move supported apps or games to another drive.

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How to Extend C Drive FAQ

Bottom Line

This post offers 3 tools to increase C drive partition. Among them, MiniTool Partition Wizard is the best one. Just have a try.

If you have any problems or suggestions about MiniTool Partition Wizard, contact us by sending an email via [email protected]. We will get back to you as soon as possible.