Merge C and D Drive in Windows Server 2019

by Lance, Updated on: March 26, 2020

This article introduces how to merge C and D drive in Windows Server 2019, 2 ways to combine partition C and D for Server 2019 with detailed steps.

All disk partitions are allocated while installing Windows Operating System or obtained from server manufacturers. With right management tool, you can create, delete, resize, move and merge partitions, etc. When system C: drive is getting full, many people ask whether it is possible to merge C and D drive, so free space in drive D will be transferred into C drive.

Actually, yes you can combine C and D drive together, but if you want to extend system C drive, you'd better resize partition instead of merging volumes. In this article, I'll show you 2 ways to merge C and D drive in Windows Server 2019 and better method to resize disk partition.

Combine C and D in Server 2019 Disk Management

Windows Server 2019 Disk Management utility has no "Merge Volume" functionality, but there is still a way to combine C: and D: drive without any software.

Drive D will be removed no matter you use Windows built-in or third party software. If you installed programs or some Windows services in it, do NOT merge drive D into C. If you can remove D drive, remember to transfer files to other place.

Steps to merge C and D drive in Windows Server 2019 Disk Management:

  1. Transfer or back up the files in drive D to other place.
  2. Press Windows and X together on the keyboard and click Disk Management in the list.
  3. Right click D: drive and select Delete Volume.
  4. Right click C: drive and select Extend Volume.
  5. Finish Extend Volume Wizard by simply clicking Next.

If your system disk is MBR, your D drive must be Primary, otherwise, Disk Management cannot merge D to C after deleting. Because Extend Volume function can only merge Unallocated space to the left contiguous partition, Disk Management can only merge D to C or E to D, it cannot merge D to E or E to C.

Merge C and D drive with server partition editor

With partition editor software, there are no such limitations. You can merge NTFS and FAT32 partitions, or merge Primary and Logical partitions together. To do this, only several clicks are needed. The most important, all files in drive D will be moved to C drive automatically after merging C and D drive.

How to merge C and D drive in Windows Server 2019 with partition editor:

  1. Download NIUBI Partition Editor, right click either drive C or D and then select Merge Volume.
  2. In the pop-up window, click the check-boxes in front of both C and D drive.
  3. Click OK and back to the main window, press Apply on top left to execute, done.

After merging D to C drive, open C: drive in File Explorer and you'll see a folder named as D to C(date_time). All files in original drive D will be moved to this folder automatically.

Video Server 2019

Resize partition instead of merging C and D drive

You'll lose D drive after merging it to C drive, no matter you use Windows Disk Management or partition editor software. If your D drive is Primary and you can remove it, you can combine volume D to C with either tool.

As I said in the beginning, if you want to expand system C drive, you'd better resize partitions instead of merging. With NIUBI Partition Editor, you can shrink D or other volume, part of free unused space will be changed to Unallocated, and then add Unallocated space to C drive. In this way, you won't lose any partition, Operating System, programs and anything else keep the same with before.

Follow the steps to expand C drive with free space on other partition(s):

Video Server 2019

When there's available free space on the same disk, there's no difference to shrink and extend partition, no matter you use single hard disk, any types of hardware RAID arrays or virtual machine in Hyper-V/VMware.

Besides shrinking, extending and merge partitions, NIUBI Partition Editor helps do many other operations such as copy, move, defrag, convert, hide, wipe, scan bad sectors.