Add space to C

Move/transfer free space from D to C in Windows 10

Many Windows 10 users feedback the similar issue that C drive is full even if they create it as large as 50GB. It is easy to understand, many types of files write into C: drive continuously, if you do not free up disk space regularly, C drive free space is running out quickly. Besides maintenance, you’d better create or expand C drive to larger size, otherwise, you’ll encounter the low disk space issue in Windows 10 again and again. To the computers that C drive are created too small, or there is not enough free space, you can transfer free space from D to C drive, and then there will be plenty of space in C drive again.

Move free space

Many people want to do this, because nobody likes to start from scratch to recreate drives and reinstall Windows. However, there are still some questions asked by these people, for example:

  1. Is it safe to resize partition and move free space in Windows 10, will it cause damage to disk drives?
  2. Which tool is better to accomplish this task?

In this article, I’ll introduce how to move free space from D to C drive in Windows 10 with safe partition software.

Use safe partition software

As people worry, some disk partition software could cause system/partition damage and data loss. These unreliable software are called data killer by the people that have experience of computer disaster. When resizing and move partitions, all parameters of related disk, partition and files should be updated correctly, but some software internal error could cause part of parameters failed to be updated. In that case, system and/or partition(s) will be destroyed. In fact, besides software internal error, some hardware issue such as power failure (especially for laptop) cause damage, too.

Backup software can protect system and data, but few personal edition can back up in real time, that means part of files will be lost if damage occur. In addition, it costs a long time to restore. To completely eradicate these risks, NIUBI Partition Editor brings innovative 1 Second Rollback technology to ensure system and data intact. It creates snapshot when starting, automatically roll back to the status of snapshot if any software or hardware issue occur while resizing and moving partitions, so your computer could recover without damage in a short time.

How to move free space from D to C

It is very easy to transfer free space from D to C drive in Windows 10, you just need to click, drag and drop on the software, steps:

Download and install NIUBI Partition Editor, from the main window you’ll see all disk partitions. In my Windows 10 laptop, C drive is 30GB and 36% free, D drive is 50GB and almost empty.

Increase C drive Win10

Step 1: Right click drive D and select Resize/Move Volume, drag left border towards the right in the pop-up window.

Shrink D drive

20GB free space is taken out from D and display as Unallocated on the right side of C drive.

Unallocated space

Step 2: Right click C drive and select Resize/Move Volume again, drag the right border rightwards to merge the 20GB Unallocated space.

Extend C drive

C drive is extended to 50GB and now there is 62% free space. Click Apply on top left to execute, done. (This partition software work in virtual mode and physical disk partitions wont’ be changed until you click Apply to confirm and execute.)

C drive increased

As you see, it is very easy to move free space from D to C drive in Windows 10, you can accomplish within 2 steps by clicking and dragging. Besides resizing and moving to change partition size, you can do many other operations with NIUBI Partition Editor, such as: merge, copy, defrag, wipe, convert, test, label, create, delete and format partitions.

Download to try