How to Safely Split System Volume/Partition in Windows 7, 8, 10?

Split system partition is more flexible than shrink volume, which makes it can shrink system volume beyond its half size in Windows 7/8/10. AOMEI Partition Assistant Standard will give you the free reliable way to split system partition.


By Lucas / Updated on May 12, 2023

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what is splitting partition?

Speaking of splitting partition, you may familiar with the concept. Splitting partition means divide one partition into two parts, then one partition becomes two partitions, which have the same file system with each other. In this way, you will get more partitions on your hard drive to save data and files.

To split a partition, some people would shrink the partition or volume. Shrinking a partition will decrease the size of it and generate some unallocated space that will be created as a new partition later.

But shrinking partition has some limits: you cannot shrink volume beyond its half size. In other words, if a partition is 250GB, you can only shrink the partition to 125GB, and it’s not allowed to shrink the partition to 100GB or less. Therefore, Split partition is designed to make up for the limitation of shrink volume, or you can say shrink partition is a part of split partition.

Why Split System Partition in Windows 7/8/10?

A user wrote his problem on the forum like this:

How to split my system partition?

My new laptop hard drive is 750GB and has only one partition (676 GB available). I intended to shrink the partition and create a 120GB C partition in Disk Management and rest of it to be used for data storage, but it only creates a 339GB C drive at most. What should I do, is there any tool to do this? Thanks a lot.


From this case, you should know why you need to do Windows split system partition: maximize space utilization. Besides, there are other reasons that you should split system partition, get more partitions to store different data in case of virus or other unpredictable event; extend other partitions.

How to split system partition safely in Windows 7/8/10?

Considering system partition contains system file and boot information, To split it, many people turn to a free yet professional partition manager-AOMEI Partition Assistant Professional, which perfectly splits system partition as you want in Windows 7/8/10 without having any influcing on system files.

More importantly, it allows you to shrink volume beyond its half size. it’s more flexible and easier-to-use. You can download the demo to have a try.

Download Demo Win 10/8.1/8/7/XP
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Step 1. Right click the system partition usually the C drive in the home window, select Split Partition at the menu. 

C Drive Split

Step 2. At the next window, specify the system C partition size to where you want by dragging the double arrow leftwards or rightwards, then hit OK.

Resize New Partition

Step 3. Preview the Pending Operations and the changes of the system partition, click Apply to confirm the operation of splitting system partition in Windows 7/8/10.

Apply Split C Drive

✍Tips: The operation will reboot your computer.

Final words

After a while, the operation of Windows split system partition will be finished perfectly. Moreover, AOMEI Partition Assistant Standard is capable of merging partitions, formatting partition, extending system partition, migrating OS to SSD drive, and more. For Windows Server uses, you can use the Server edition to split the system drive.

Lucas · Staff Editor
I prefer peaceful and quiet life during vacation,but sometimes I watch football match if my favorite club performs brilliantly in that season. And I love reading, painting and calligraphy, thus I send my friends festival handwriting cards every year.