If you want to extend your disk partition and find it greyed out in the disk management of Windows, you come to the right place. This article will show you different ways to extend partition on Windows 7/8/10 for free.
For most people, when they want to extend their C drives, they will choose to extend the partition with Disk Management built in Windows system.
But sometimes, they will find that their "Extend Volume" greyed out, why?
There are some reasons why the "Extend Volume" greyed out:
1. The partition is not NTFS file system, if your file system is FAT32, it won't work.
2. There is no continuous unallocated space on the drive partition which you want to extend.
Is there any way can extend partition on NTFS file system and without disk management tool?
Fortunately, the answer is yes.
If you want to extend partition in the NTFS file system, you will need a professional partition resizer, I can recommend a freeware for you.
IM-Magic Partition Resizer Free Edition is a 100% safe freeware which can extend, shrink, wipe your drive partitions. You can totally trust it, because it is a 100% freeware and effective program.
You don't need to worry about system compatibility problem, because IM-Magic Partition Resizer Free Edition supports most Windows system including Windows 7/8/10/XP/vista.
You can download the free program here:
Extend Partitions on Windows 7/8/10/vista/XP
If you want to extend your partition, you can shrink another partition which has more unallocated space, or merge your partition with another free partition.
Step1: Start the software and select the drive you want to extend.
Step2: Right-click the drive partition and choose "Resize/Move Partition"
Extend partitions on Windows 7/8/10/vista/XP
Then you can extend the drive partition by dragging the mouse.
Video Tutorial to Extend Partition on Windows 7/8/10/vista/XP
If you want to extend your C drive by move space from another partition which is not adjacent to C drive, things may get a little difficult, you can watch the steps on the video tutorial, you will understand.
Here is also a Windows server repartition software for server 2003/2008/2012/2016, but it is a paid program.
You can free download its trial here: