Merge C and D drive

Merge C and D or E drive in Windows 10

Many types of files write into both system C drive and data volumes every day, so you need to modify these drives some day. With partition software such as NIUBI Partition Editor, you can shrink, extend, merge, convert, copy partition, etc.

Among these disk space issue, C drive full in Windows 10 is most common. In this case, some people want to merge C and D drive to increase C drive space. But programs are installed in D drive in many computers, so it is not a good idea to merge D to C drive. Many people are wondering if it is possible to merge C and E drive, because the files in E can be transferred easily. Yes, it is possible to combine C and D drive, or merge C and E drive in Windows 10. But if you don’t want to lose any drives, the best way is resizing partition in Windows 10 instead of merging.

In this article, I’ll introduce all the methods to merge C and D drive, combine C and E drive, shrink and extend partition in Windows 10 without losing data.

Merge C and D drive

How to combine C and D drive

Download NIUBI Partition Editor and you’ll see all connected disks with partition layout.

Merge C and D

1. Right click C or D drive and select Merge Volume, in the pop-up window, select both C and D (position 1) drive and then click the drop-down box to select destination drive (position 2).

Select drives

Note: to avoid system boot failure, merge C drive to D is disabled.

Cannot merge C to D

2. Click OK and back to the main window, drive D is merged into C. Click Apply on top left to execute, done.

Merge D to C

Open C drive when it complete, as you see, there is a new folder created, which is named as D to C (date time). All files in drive D will be moved to this folder automatically.

New folder

It is very easy to merge C and D drive in Windows 10, just run NIUBI Partition Editor and select both drives, all what you need to do is simply clicking. However, it is not a good idea to extend C drive by merging D to C. Most of computer users install programs to D drive, so these applications won’t be valid after merging volumes, though all files are moved to C drive.

Resize volumes instead of merging

By resizing partitions, you can shrink D to get Unallocated space and then add into C drive, so drive D won’t be lost. Except partition size changed, everything else keeps the same. Watch the video:

How to merge C and E drive

By following the steps in the video above, you can shrink D or any other data volume to extend C drive. If you still want to merge nonadjacent volumes such as C and E drive, follow the steps:

Step 1: transfer all files in drive E to other volume.

Step 2: Run NIUBI Partition Editor, right click E and select Delete Volume.

Delete E

Disk space of drive E will be converted to Unallocated.

Drive E deleted

Step 3: right click drive D and select Resize/Move Volume, drag the middle position rightwards in the pop-up window.

Move D drive

Unallocated space will be moved to the left side of D.

Unallocated space moved

Step 4: right click drive C and select Resize/Move Volume again, drag right border rightwards in the pop-up window.

Extend C drive

Unallocated space will be merged into C drive. The operations will be listed as pending on bottom left, click Apply on top left to execute.

C and E merged

NIUBI Partition Editor can merge C and E, or combine C and D drive in Windows 10 easily. If you want to change partition size without losing a drive, simply resize them instead of merging.

Download to try

How to merge/combine c and d drive in Windows 10?
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