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How to increase C drive space or extend C drive?

Updated on Sep 07, 2018 by Daisy to Partition Manager

How to increase C drive space, extend C drive or system partition? This tutorial shows you how to free increase C drive space with EaseUS Partition Master.

"How can I increase my C drive space without erasing data? Many suggestions are about a quick disk formatting, but that's totally unacceptable to me. In recent days, a 'low disk space' pop-out balloon keeps appearing in the Systray, so it's time to solve the problem."

In Windows 10, 8.1, 8 and 7, the user experience of running an operating system largely depends on the available C drive space. Normally, there are C drive (system drive), D drive, E drive, and even more chunks on a Windows computer hard drive, and over 90% users adjusted the C drive space once or twice because the free space approached the threshold of 200MB, 80MB, and 50MB. 

Let' see how they usually gain the extra space for the loaded system drive.

90% choice★★★ | A thorough spring clean of less frequently used bloatware, extremely large files, useless junk files, outdated system data,  temporary files, cache data...Everything that's unnecessary while working on a computer. That's a disk cleanup program will do.

30% choice| A massive data transfer. e.g. transfer programs from C drive to D drive or simply to an external flash drive. That's a Windows easy transfer tool will do.

100% choice★★★ | A direct disk space resizing by adding space of D, E, F drive to the C drive. That's a partition manager will do.

When it comes to increasing the size of the C drive, many people are reluctant to give up existing files and installed programs. Undoubtedly, the most applicable way if the last method! As long as there are other drives on the same hard drive and they have free space to lend. Read the how-to details.

Things You Need

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 Windows 10 is supported

Follow EaseUS Partition Master Server if it's for increasing space in a Windows server drive. 

How to increase C drive space with EaseUS Partition Master?

The following is a step-by-step instruction to extend the system partition (C: drive).

Step 1. Launch EaseUS Partition Master.

EaseUS partition manager software

If there is no unallocated space behind the system partition, please strictly follow the Step 2~Step 5. If there is unallocated space right behind, or in front of, the system partition, please directly jump to the step 4.

Step 2. Select the partition (e.g. H:) behind C, right-click on it, select "Resize/Move partition" and drag the partition handle leftwards to shrink the H: drive. Then there will be unallocated space.

Resize/Move partitions

Step 3. Move the H: drive rightwards to let the unallocated space be behind the system partition (C: drive) and click "OK".

Shrink partition

Step 4. Select the system partition (C: drive), right-click on it, select "Resize/Move partition", and drag the partition handle rightwards to extend the system partition (C: drive).

add space to c drive

Step 5. Click "Apply" to save the changes.

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 Windows 10 is supported