By Bryce / Last Updated August 5, 2019

Need to resize C drive in Windows Server 2019

Usually, C drive is the system drive with OS installed. In Windows Server 2019, it is not rare to find out that C drive is almost full while other partitions have much space left or the capacity of C drive is too large. If C drive is in low space, your machine might run slowly even crash; If C drive is allocated with too much space, other partitions can be too small to store more data. Thus, you need to change the partition size of C drive in Windows Server.

Extend or shrink C drive within Disk Management

Disk Management, a built-in tool on Windows Server 2019, enables you to create, delete, shrink, delete partition and etc. You can use it to change size of partition C on Windows Server 2019. Firstly, Press Windows+ R, enter diskmgmt.msc and press Enter to access Disk Management. Then, let’s see how it works:

To extend C drive with deleting partition

[The following steps are based on that there is no contiguous unallocated space behind C drive. In such condition, you need to delete the partition right behind C drive (supposed it is partition D) to get such unallocated space. If you shrink partition D, the unallocated space will be behind partition D and the option of Extend Volume is still greyed out.]

Warning: This way will make data loss, it is recommended to back up necessary files in advance.

1. If D drive is the partition right behind C drive. Right click it and select Delete Volume and click Yes.

2. Right click C drive and choose Extend Volume.

3. Follow the prompts to complete operation.

Note: If there is a contiguous unallocated space behind C drive, you can extend C drive in Windows Server 2019 directly.

To shrink C drive directly

1. Right click C drive and choose Shrink Volume.

2. In the pop-up window, type the amount of space that you want to shrink by and click Shrink button.

3. After a while, you can get an unallocated space next to C drive. You can create a new partition on the unallocated space.

A great alternative to Disk Management on Windows Server

Surely, you can increase or decrease the size of C drive via Disk Management in Windows Server 2019. But it is a lit bit troublesome to extend C drive as the whole process involves partition deletion even data backup and restore; besides, there are chances that you can’t shrink C drive due to unmovable files even there are plenty of unused space on C drive.

At this time, an overall and powerful partition tool – AOMEI Partition Assistant Server is highly recommended. It is compatible with various editions of Windows Server, including Windows Server 2019, Windows Server 2016, and Windows Server 2012 etc. It enables you extend C drive without deleting partition when there is no contiguous unallocated space by directly allocating free space from another partition to it; decrease the size of c drive beyond the limitation of unmovable files.

Resize C drive easily via AOMEI Partition Assistant Server

To resize C drive in Windows Server 2019 effortlessly and effectively via AOMEI partition Assistant Server, install and run it. Then, just do as the following steps:

To extend partition C without data loss

Step 1. In the main interface, right click D drive and choose Allocate Free Space.

Allocate Free Space

Step 2. In this window, choose the size that you want to allocate and choose C drive as the destination drive. Then, click on OK button.

Allocate Free Space From D To C Drive

Step 3. You can review the result of the operation. If you are satisfies, click Apply and Proceed to commit it.

Proceed

Note: If there is a non-contiguous unallocated space, you can merge the unallocated space into C drive.

To shrink partition C successfully

Step 1. Right click C drive, and choose Resize Partition.

Step 2. In the pop-up dialogue, drag the slide bar leftwards to shrink C drive. And then, click OK.

Step 3. You’ll return to the main interface, click Apply and Proceed to execute operation.

After shrinking C drive, you’ll get an unallocated space. You can add it to another partition or create a new partition with it.

Wrap things up

Whether you want to extend or shrink C drive in Windows Server 2019, AOMEI Partition Assistant Server can helps a lot. In fact, it is equipped with a lots of other greate functions, like converting dynamic disk into basic without data loss, clone Windows Server to new hard drive and more.