> How to > Partition Master > How to Make C Drive Bigger in Windows 7/10

How to Make C Drive Bigger in Windows 7/10

Updated on Dec 11, 2018 by Daisy to Partition Master

Your Windows 7/10 system drive, C drive is full and runs out of space? Take it easy. Here you can learn how to make your C drive bigger by sparing some disk storage from other drives to it.

"Can I spare some disk storage from D to C drive partition to make C drive bigger? My laptop used to run Windows 7, and lately, I upgraded Windows 7 to Windows 10. Everything is fine with the new operating system except that the system drive becomes stuffed. However, a considerate amount of space is available to use in other partitions. I'm thinking to allocate the unused space to C. Is it possible to do that?"

When upgraded your previous Windows to Windows 10, it's common to see that C drive (your system partition) runs out of space, because system data, files, and folders from the old Windows OS and the new are all concluded in the drive, making Windows 10 rollback in one month possible.

Once C drive is full, your computer performance starts lagging. In such a case, each time it takes a little longer to boot up the machine, launch and run a program, play a game, etc. To fix the "insufficient C drive space" issue, you'd better do a reallocation of space of the hard drive instead of replacing the drive by a larger one.

How to Enlarge C Drive Partition by Taking Space from Others

Here are two typical free solutions people usually take to increase C drive space. On both Windows 7 and Windows 10 computer, you can use a program called Disk Management, where you can access by right-clicking "Computer" and then go to "Manage". On the left side of the opened window, you can find "Disk Management" under "Storage".

But most of the time, the extend volume option is greyed out in Disk Management if there's no unallocated space (i.e., with no drive letter and file system) available on the drive. For average users, it's hardly possible to make C drive bigger here.

extend volume is greyed out

To simplify the system partition resizing process, you can use a third-party free partition manager. EaseUS Partition Master Free is the highly recommended one. Just download and install the hard disk management utility on your Windows 7 or Windows 10 computer, you can freely create more space for the C drive in short of disk capacity.

Download Now

 Windows 10 is supported

How to Use EaseUS Partition Master Free to Increase C Drive Space:


Step 1: Launch EaseUS Partition Master

Run EaseUS Partition Master

Step 2: Increase C drive space

1. Shrink partition to free up unallocated space:

Right-click on a partition next to the C: drive and select "Resize/Move".
Drag either end of the partition to shrink and leave unallocated space behind the system C: drive and click "OK".

2. Right-click on C: drive and select "Resize/Move".

Extend System partition

3. Drag the system partition end into unallocated space so to add space to C: drive.

Add space to C drive

Step 3: Keep all changes to extend C: drive

Click the "Execute Operation" and click "Apply" to keep all changes so to extend the system C: drive.

Confirm to extend system C drive