Extend C Drive

How To Extend C Drive in Windows 10?

How To Extend C Drive in Windows 10?

Extend C Drive

C drive, the system partition, is generated automatically when you install the Windows 10 operating system, which is used for storing OS or other system files. When you use your computer with Widows 10 installed on, the applications or programs you download from the website will be stored on C drive by default as well as other User data like Documents, Pictures, and so on.

With so much data increased day by day, you will find your C drive is full soon following by receiving the low disk space warning frequently, which means your OS is losing its healthy environment to run normally and smoothly. Slow performance, longer boot time, and abrupt shutdown come behind. This may have disturbed you for a long time, impelling you to search the Internet for solutions to it.

Apart from cleaning up disk, moving folders from C drive to another drive, free up disk space, and so on, you can try extending C drive in Windows 10, which is also the main content we are going to talk about in the following part.

Extend C Drive In Windows 10?

As we know, C drive is related to OS files, thus any operation on C drive must be careful enough to keep the data in a good mood. Therefore, although you can extend C drive via Disk Management or DiskPart which exist the potential risk of ruining C drive, here we highly recommend you a Free Partition Manager named AOMEI Partition Assistant Standard to you. This software is an expert in managing your partitions, allowing you to execute the operations always in a safe situation.

Besides, due to various users’ partition conditions, it provides different functions like “Resize Partition”, “Move Partition” , “Merge Partition” , etc. You can choose the super one according to your personal needs and requirements. Let’s see how to extend C drive in Windows 10, 8, 7, XP, Vista and the newest Windows 11 via this professional software.

Note: Extending C drive in Windows 10 usually requires unallocated space on the same disk. Since the unallocated space may be adjacent or not adjacent to the C drive, here are two cases you can refer to.

Extend C Drive with adjacent unallocated space

If there is the unallocated space adjacent to the C drive, “Resize Partition” should be your best choice, and you can finish it only in several clicks.

  • Install and open AOMEI Partition Assistant Standard, right click C drive, select “Resize Partition” to execute the following operations.
  • Drag the bar towards the right to extend the partition with the unallocated space or type the number as you like and click “OK” > “Apply” to commit the operations. (“Advanced” feature allows you to adjust other settings manually.)

Extend C Drive with non-adjacent unallocated space

If there is no unallocated space adjacent to the C drive, you can try another feature named “Move Partition” to move unallocated space to the right or left of C drive. Let’s see how does it works.

  • Right-click the partition next to the unallocated space, choose “Move Partition”.
  • Drag the partition to the right, and it will be moved. At the same time, the unallocated space has been moved to near C drive. Now, you can use “Resize Partition” to increase C drive space as we present above.

Check:  File Backup Software Free for Windows 10.

You Want To Know About Extend C Drive

However, what if there is no unallocated space on the disk? Actually, no matter there is unallocated space or not on your disk and no matter the unallocated space is adjacent or not adjacent to the C drive, the most effective way you can experience in this software is using “Merge Partitions”. It allows you to merge any unallocated space into the existing partitions and merge two adjacent partitions. Let’s have a look.

  • Right-click C drive. Choose “Merge Partitions”.
  • Tick unallocated space (or the adjacent partition with enough space) and click “OK” > “Apply”.


Apparently, it’s not complicated to extend C drive in Windows 10/11 with the help of AOMEI software even there is no unallocated space on the disk. As a Disk Management Windows 10, this software provides various features to meet your different needs and always be a good helper no matter what partition problems you are trapped in. You can download it to enjoy more useful and powerful functions.






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