Hi guys, I just bought a laptop with a 1TB hard drive, there are just two partitions
in Disk Management: one is a 910GB C partition, another is a Recovery partition. I
am trying to create a new partition on my hard drive for other use. However, I can’t
reduce the C partition size less than 455GB, I want to get a 100GB partition.
Why Do You Reduce Partition Size?
Reducing Partition size means decrease partition size on the existing partition.
After shrinking volume, you will get an unallocated space. Thus, you can take
advantage of the unallocated space to create a new partition for data storage,
increase other partition (for example, extend the system partition to disable the
low disk space warning on Windows computer), or create another partition to install
another operating system like Linux or Windows.
Nowadays, Windows is capable of resizing partition in Disk Management, resize
partition includes extend partition size and shrink partition size. How to reduce
partition size in Windows 7/8/10?
Windows Shrink Partition with Disk Management
The following content are about reducing Windows 7 partition size in Disk
Right click Computer on the desktop, choose Manage.
Select Storage>Disk Management.
Right click the partition that you want to reduce, select Shrink Volume.
Edit the proper size for the new partition, then click Shrink.
However, you can’t reduce the system partition beyond half its size in Disk
Management. It’s the restriction in Disk Management. In other words, if your C drive
is about 270GB and its free size is about 256GB, the available shrink size is about
132GB. You can’t shrink C drive to get an unallocated spaced more than 135GB. That’s
why the problem appears in that case at the beginning.
On the other hand, if you reduce C partition size to get an unallocated space beyond
half its size with DiskPart, you will get an error message that the parameter is
incorrect. Therefore, if you want to get more unallocated space from system drive
for other use, you may turn to other disk partitioning software for help.
Reduce Partition Size with AOMEI Partition Assistant
As the best free disk partitioning software-AOMEI Partition
Assistant Standard can make up for the limitations of Disk Management and
DiskPart command, which allows you to reduce partition size beyond its half size to
fully use the free space. Here is how it works:
1. Free download AOMEI
Partition Assistant Standard, install and run it.
2. Pitch on the partition you want to reduce, select Resize
3. Slid the double arrow leftwards to reduce the partition size, you can only reduce
its size to the used space.
4. Click Apply to reduce partition size for Windows 7/8/10
After a while, you will get an unallocated space, then you can create partition on it, or merge
the unallocated space to other partition to extend partition size. Besides,
AOMEI Partition Assistant has the ability to split partition, delete partition,
recover deleted partition, create bootable media, and migrate OS to SSD drive, and
more. For advanced users, you can try AOMEI
Partition Assistant Professional edition.