By AOMEI / Last Updated February 26, 2020

What is Free Space?

Free space is also called unused space or free capacity. It belongs to a partition and is available within a partition. As we all know, our life depends on computer heavily and most of users install system on C drive. With time goes by the free space of your C drive is less than before due to the increasing data. In this situation, you may be crazy with the slow computer speed and have low work efficiency causing by low disk space of C drive. This is so terrible for you. So you will image if you can move the free space from D drive to C drive, you can take full advantage of storage space and speed up your computer. Fortunately, the third-software AOMEI Partition Assistant Server Editionhelps you solve the problem easily.

Why Choose AOMEI Partition Assistant Sever Edition?

AOMEI Partition Assistant Sever Edition is all-in-one software which is especially designed to Server users. It can help you move free space from D drive to C drive. Besides, it has a lot of features which can be widely used in partition management, such as allocate free space, convert dynamic to basic disk, resize partition, migrate system to SSD, convert MBR to GPT and more useful features. Besides, all of the features can work on Windows 8, Windows8.1, Windows 7, Vista, Windows Server 2003, 2008, 2012 R2. It satisfies the needs of all the users.

May be some users will point out that the built-in tool in Servers called Disk Management also can help you to manage your partition. This is absolutely right. The tool with the features create/delete/extend/shrink partition only can help you solve some problems sometimes. Because, the Extend Volume is only valid when there is unallocated space next to the drive which you need to expand. Furthermore, with the tool, you can not shrink a partition to the size of minimum.

Compared with Disk Management, AOMEI Partition Assistant Server is more freely. Besides, it can demand your advanced needs for partitions and manage your partitions without losing any data. Meanwhile the simple interface can be accepted by the user who even has no specialized knowledge of computer. What most important is that there is no "Extend and Shrink" features in Windows 2000/2003 Server, while the software can support Windows 2000/2003 Server.

How to Move Free Disk Space to C Drive from D Partition?

With the easy-to-use interface, you can finish the task in seconds even you don’t have much knowledge of computer. Furthermore, the operating is safe and you will not lose any data. The detail steps will be showed as follows:

Before you do:

  • You can only allocate the free space from one partition to another. Besides, the space being allocated should be less than or equal to the unused space of source partition in size.

  • If there are other applications running on the partition, AOMEI Partition Assistant will notice you to close those applications by click “Retry” (it is also the recommended option) or to execute this operation in PreOS Mode by choosing “Restart Now” (Your computer will restart if you press this button) or just to click “Cancel Operations” to finish this operation by rebooting your computer and redoing it without opening those applications.

Step 1, install and launch the software. Right-click D drive and then choose Allocate Free Space.


Step 2, type the size of free space which you want to cut from D partition click OK. You will see the free space is added into C drive. Then click Apply, precede your operations.



  • This operation may change the original location for your data, so, in order to guarantee the safety of your data, we suggest you to learn the tutorial "How to Safely Partition" before executing this operation.

  • After executing the allocation operation, the program will take some free space from the source partition to the target partition. In other words, the source partition will be shrunk, and the target partition will be expanded.

With few steps mentioned above, you can extend C drive freely without time consuming. What’s more, there are different versions designed to various users, such as AOMEI Partition Assistant Unlimitedand Technician, please choose the most suitable version.