Windows 10: How to Merge C:/ Drive Back to Physical Drive

Hey Folks,I recently updated my memory for my OC. I installed a WD SN850X NVMe SSD into my PCIe x4 port Gen 3.0 on my motherboard. I got it to work properly and be recognized by the disk management. I figured out I needed to enable/install a drive "Standard NVM Express Controller" under Storage controllers within Device Manager. Once I did this, the NVMe SSD worked and I could migrate my OS to it. My issue is that the new C:/ drive partitioned itself and is now a separate entity within device manager. The space allocated for the C:/ drive is only the exact size of the C;/ drive, which is the

:)

 

how to merge c drive and d drive

It depends on a couple things.

If you have two separate physical C and D drives, you can't merge them.

If the D drive is a partition (not a drive) and its to the right of C:\ in Disk Management, you can right click C:\ then click Extend.

Press Windows key + X

Click Disk Management

Take a screenshot then post in a reply here.

If the layout is similar to how I described it, try the following. Make sure important data is backed up if there is any.

Select the D:\ partition

Right click the ‘D:\’ in Disk Management, on the contextual menu, click the ‘Delete Volume’ option. Click ‘Yes’ when the warning dialog appears.

The Volume you deleted will now appear as ‘Free space’, you will also notice that the disk icon no longer appears in the list of volumes.

Right click the Free space partition, and click Delete, click Yes on the Disk Management warning that appears.

The volume will now appear as Unallocated. Our next step is to merge back that unallocated free space with the system partition (C:\). Right click the System volume and click the ‘Extend Volume’ option on the contextual menu, click ‘Yes’ when the warning appears.

A wizard will now begin that will guide through the steps to merge back the unallocated space with your system partition.

The wizard provides a simple procedure to merge back the unallocated space with the system drive. Once you have selected the space, click Next, at the end of the wizard, you will see the amount allocated.

 

Merging the C drive with the D drive

If you had two partitions on a single physical drive, you could merge them. But since you have two separate physical drives, you can not.

Also note than a 120GB C: drive is very small. If you can afford it, I would recommend replacing it with a considerably larger drive--at least 512GB.

 

Merge SD card to C: drive

What you're trying to do can't be done. You can't extend a partition one physical drive to another physical drive. You've made the common mistake of buying a device with only 32GB (nominal) of storage space, which is not nearly enough to sustain a Windows
10 installation.