Why am I Not Able to Extend My C Drive
My C drive is running out of storage space, so I was trying to extend my C drive. My disk has 15 GB of unallocated space, but there are 2 healthy partitions between my C dive and the unallocated space. Can someone tell me why I am not able to extend my C drive in Disk Management? Is there any other way I can do this? Thanks in advance!
Best Answered by
Oliver· Answered on Jul 08, 2025
The fact you are unable to extend the C drive in Disk Management is because there's no adjacent unallocated space to your C drive.
If there's unallocated space on your disk, but it's not next to your target partition, you will notice that the Extend Volume is greyed out in Disk Management. However, there is an effective way you can extend your C drive with the nonadjacent unallocated space.
A professional disk partition manager tool - EaseUS Partition Master Professional, has the ability to extend any partition on your disk even if the unallocated space is not adjacent to it.
You can follow the steps below to extend your C drive with ease:
Step 1. Launch EaseUS Partition Master and go to the Partition Manager section.
Step 2. Select your C drive and click on "Resize/Move."
Step 3. Drag the partition panel to add the unallocated space into the C drive. Then, click "OK" to confirm.
If the unallocated space is not on the same disk where your C drive is, EaseUS Partition Master also supports extending the C drive with free space from another disk.
Further reading: [100% Fixed] Can I Extend C Drive from Another Disk in Windows 10/11?
