Why extend C drive in Windows 7?
Windows 7 is a popular operating system for computer system. Although the Microsoft
released Windows 10, there are still many users keeping Windows 7. However, many new
applications will occupy a lot of space. With the time goes by, the C drive may run
out of space, and it may cause the whole system running slowly. Thus, extend C drive
for Windows 7 would keep the system running normally.
The ways to Windows 7 extend C drive
Windows 7 has a snap-in tool called Disk Management. It has a great powerful function
Extend Volume. The Extend volume can help you extend C partition or other
partitions. However, it can only extend partition which has an unallocated space
adjacent to it. If there isn’t any unallocated space, the Extend Volume would be
grayed out, and you can not use it.
What if the Extend Volume grayed out? There is another way that you need to use a
third-party software AOMEI Partition Assistant. This software is a
powerful freeware for managing disks, and you can use it to extend or shrink
partitions easier. For extending C drive, the AOMEI Partition Assistant provides at
least three methods to make it without losing data. But first, you need to download the free edition AOMEI Partition Assistant Standard,
install and launch it.

1. Resize Partition
If there is an unallocated space adjacent to the C drive, you can use the Extend
Volume of Windows built-in tool Disk Management. Or use the Resize Partition of
AOMEI Partition Assistant. Click the C drive and select Resize
Partition.

Resize Partition has an advantage that it can extend partition too if there is an
unallocated space which isn’t next to the C drive. If there is another partition
between C drive and the unallocated space, you can move partition to make the unallocated
space adjacent to the C drive, then use the Resize Partition to extend system
partition. Whatever the unallocated space before the C drive or next to the C drive,
Resize Partition can extend the C drive for Windows 7. While the Extend Volume of
Disk Management can only be used when the unallocated space is next to the C drive.
2. Merge Partitions
Usually, the C drive is the system drive and the D: drive will be next to the C
drive. If you want to extend system drive for Windows 7, merge C drive and D drive
is a good way. Just right click C drive, select Merge Partitions,
and follow the guide to increase the volume of C drive.

Merge Partitions can merge any unallocated space and the adjacent partition.
3.Extend Partition Wizard
AOMEI Partition Assistant has Extend Partition Wizard, and you can follow this Wizard
to extend system partition by the guide simply.

There are many ways for you to expand C drive such as the tool GParted Windows 7. But the
AOMEI Partition Assistant should be the best choice for its powerful features. It
supports almost all the Windows OS including Windows XP/Vista/7/8/8.1/10. So, if you
want to upgrade the Windows 7 to Windows 10, AOMEI Partition Assistant can be used
in Windows 10 too.
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