How to Merge C and D/E Drive in Windows Server 2016

by Jordan, Updated on: October 3, 2021

There are 2 main benefits to merge partitions in Windows 2016 server: reduce partition number and expand a partition by transfer free space from the other one. This article gives complete solution to merge C and D drive, combine D and E drive, or merge C and E drive in Windows Server 2016. If you want to extend a partition by merging another one, it is better to resize partition rather than merging them together.

How to merge D and E drive in Server 2016 without software

If D and E are contiguous and on the same disk, you can combine drive E to D without any software. Windows Server 2016 Disk Management has no Merge Volume function, but it can realize indirectly with another Extend Volume function.

Steps to merge D and E drive in Windows Server 2016 Disk Management:

  1. Transfer all files in drive E to D.
  2. Press Windows and X together on the keyboard and click Disk Management in the list.
  3. Right click E: drive and select Delete Volume.
  4. Right click D: drive and select Extend Volume.
  5. Simply click Next till Finish in the pop-up Extend Volume Wizard windows.

It is easy to combine D and E drive when they are contiguous, but there are some limitations with Disk Management:

With NIUBI Partition Editor, there are no such limitations, you can merge 2 contiguous partitions via several clicks, no matter the partitions are NTFS or FAT32, Primary or Logical. In addition, files in a partition will be moved to a root folder in the other one automatically.

How to merge C and D drive in Server 2016 when they are adjacent:

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

Watch the video how to operate:

Video guide

How to merge C and E drive when they are nonadjacent

If C and E drive are contiguous in your server, follow the steps above to combine these partitions. But if C and E drive are nonadjacent, no software can combine them directly. You need to delete E drive manually and then merge Unallocated space to C drive.

Steps to merge C and E drive in Windows Server 2016 with NIUBI:

  1. Right click E: drive and select "Delete Volume", then its disk space will be changed to Unallocated.
  2. Right click drive D: and select "Resize/Move Volume", drag the middle towards right in the pop-up window, then Unallocated space will be moved to the left.
  3. Right click C: drive and select "Resize/Move Volume" again, drag right border towards right to merge this contiguous Unallocated space. Remember to click Apply to take effect.

Video guide

Consider resizing instead of merging C and D drive

If your aim is to extend C drive, it is not suggested to merge C and D drive in Windows 2016 server. There's better method with NIUBI Partition Editor. You can shrink D, E or any partition on the same disk to get Unallocated space, and then add this Unallocated space to C drive. In this way, you won't lose any partition. Operating system, programs and anything else keep exactly the same with before.

Watch the video how to extend a partition by shrinking another one:

Video guide


If you use SSD or any types of hardware RAID array, or run Windows 2016 server in VMware/Hyper-V, the steps are the same.

Better than other tools, NIUBI Partition Editor has innovative Virtual Mode, Cancel-at-well and 1-Second Rollback technologies to protect system and data. Besides merging partitions in Windows Server 2016/2019/2003/2008/2012, it helps do many other disk/partition management operations.