By Dervish / Last Updated March 3, 2022

What is Expart?

ExPart is a command-line disk management tool that is used to create, expand, shrink partitions in some old Windows operating systems, which don’t have DiskPart.exe and Disk Management, such as Windows Server 2003.

If your system C drive is running out of space, Dell ExPart was a convenient tool to extend the C drive for decades. However, it quite old, so it is high possible that you may encounter some issues, like error message “Dell ExtPart unable to connect to C or it does not exist” or “the selected volume cannot be extend/shrink”. So if you also got this problem, try the following solutions to solve it.

Extpart Unable To Connect C

How to fix Dell Extpart unable to connect to C or it doesn’t exist?

Usually, Dell ExPart error happens when certain applications, programs, or services is running and ExPart utility is locked, so you can close them, like Disk Management console, backup schedule, VMware that are main reasons causing ExPart unable to connect to a volume.

If closing some programs won’t help, you can try Restarting PC into Safe mode. It will start system with default settings and basic device drivers. And it may help you out of the error.

1. Press “Win + R” to launch Rub box.

2. Type “msconfig” on it, and click “OK”.

3. When “System Configuration” is launched, under the “Boot” tab, check “Safe Boot”.

Then your PC will be run into Safe Mode. Launch ExtPart to complete operation. If you still receive “ExPart unable to connect to C or it doesn’t exist”, you can turn to another partition manager to perform it.

Alternative to Dell extpart for expanding or shrinking partition

When Dell ExtPart failed to connect, you can turn to a third-party disk management tool, AOMEI Partition Assistant Standard. It not only supports various features, including extend, shrink, create, merge, format partition, but also come with users-friendly interface making all operation easy. It supports most Windows operating systems, like Windows 11, 10, 8, 7, XP, Vista.

Now, you can download this software to resize your disk partition by following the guide below of extending D drive to extend C drive.

Download FreewareWin 11/10/8.1/8/7/XP
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✍Note: If you running with Windows Server 2003, 2008, 2012, 2016, 2019, please turn to Server Edition.

Step 1. Open AOMEI Partition Assistant, you will your disk information and various features demonstrated on the main interface. To change a partition size, right-click on it, and choose “Resize/Move Partition”.


Step 2. Drag the border of the partition leftward to shrink the size. Then click “OK”.


Step 3. You will see the change on the interface. You can click “Apply” to commit it. If you want to extend a partition with the shrunk space, right-choose the partition you want to extend, and choose “Merge Partitions”.

Merge Partition

Step 4. Select the unallocated space. Then you can choose another partition to merge with it into bigger one if you need. And click “OK”.


Step 5. Now click “Apply” on the left-top corner to commit the changes.



So when Dell ExtPart unable to connect to C volume or it does not exist”, you can disable some program and close software to solve this issue or turn to AOMEI Partition Assistant. And you can upgrade to professional Edition or choose Server Edition to unlock more advanced features, including split partition, allocate free space, clone MBR disk to GPT, GPT to MBR disk.