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Merge Unallocated Space to System Partition in Windows 10

Updated on Nov 28, 2018 by Jean to Partition Master

Summary:
Facing Windows C drive full problem in Windows 10? EaseUS partition software can help you merge unallocated space to system partition to extend C drive.

Can I Merge Unallocated Space to System Partition in Windows 10

I use a 2TB Seagate hard drive as the internal memory of my computer. I have partitioned the disk into four partitions: C drive is for the OS, D drive is for my applications, and the other two partitions are for my files. But now I find the C drive is running in low disk space while D drive has much-unallocated space. So I was wondering how I can merge unallocated space to the system partition. Is there any way I can do this? My computer runs Windows 10. Please help!

Usually, when you encountered Windows C drive full problem in Windows 10, you can merge unallocated space to system partition to extend C drive. Then the problem will be solved easily. For example, if there is much free space on your D drive, you can shrink it and merge the newly unallocated space into C drive. It is an easy and safe way to increase C drive space. You don’t need to worry that it will let you lose any file paths for the programs on D drive or mess up the Windows 10 OS on the system partition. 

Steps to Merge Unallocated Space to System Partition in Windows 10

Now you might think what tool can you trust to do the task. Here we recommend EaseUS partition software. The program works well to resize a partition. It has helped numerous users deal with disk partitioning job, especially low disk space problem. With its help, moving unallocated space to system partition in Windows 10 should not be a problem.

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 Windows 10 is supported

Step 1: Launch EaseUS Partition Master

Run EaseUS Partition Master

Step 2: Add space to the System C drive

1. Shrink partition and leave unallocated space for extending C: drive:

  1. Right-click on a partition next to the C: drive and select "Resize/Move".
  2. Drag either end of the partition to shrink and leave unallocated space behind the system C: drive and click "OK".

2. Right-click on the System C: drive and select "Resize/Move".

Extend System partition

To add space to the C: drive, drag the system partition end into unallocated space.

Add space to C drive

Step 3: Confirm to extend system C drive

Click the "Execute Operation" button, check all the operations waiting for pending, and click "Apply" to keep all changes so to extend C drive.

Confirm to extend system C drive