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How to extend system partition ( C drive) to optimize the performance of your computer?

Low Disk Space

Have you ever met low disk space warning when using the computer? Windows create the low disk space warning to alert computer users when there is not enough space on the disk. When this warning pops out, it means that you will suffer a big risk of data loss and low work efficiency with the computer. The reason is that if there is no enough space for the system, the computer will not work efficiently and stably. Besides, defragment and more installation are not available.

If there are too much data in system partition (C drive) and c drive full or in low disk space, you need to extend system partition to optimize disk space usage and get powerful partition and hard disk management to increase the efficiency of Windows-based system administration. How to extend system partition, please read the following.

Solutions to extend system partition (C drive)

Solution 1. Extend system partition with EaseUS Partition Master
Solution 2. Extend system partition with Windows built-in Disk Management
Solution 3. Extend system partition with Windows built-in DiskPart command

Solution 1 - Extend system partition with EaseUS Partition Master

Before doing any operations in extending system partition, do remember to backup all important data in computer partitions. Or you’ll suffer huge data loss problem. Free download EaseUS Partitin Master and apply this partition manager software to help you extend system partition(C drive) now.

Tips: If there is not enough free space to install EaseUS Partition Master on the system partition (C: drive), please change the installation directory to other partition while installing EaseUS Partition Master.

 DownloadWin Version

1. Download and launch EaseUS Partition Master.

2. Right click the D: partition and choose "Resize/Move partition" to carve up free space for the system partition(C: drive).

Resize and Move partition

3. Position the mouse pointer on the partition that you need resize to leave more free space for extending system partiiton and drag the handle to adjust its exact size.

Extend system partition

If the unallocated space is not right behind system partition, use the mouse to drag it right next to system drive(C partition). And then put the mouse pinpiont to the right handle of system drive, drag it rightwards to extend system partition(C drive).

Tip: Sometime the unallocated space is on the left of the partition you want to extend, just drag the left partition handle leftwards to the size you want.

4. Click "Apply". You will have a bigger system partition(C drive).

Tips: Extend NTFS system partition without rebooting the computer, refer to how to extend NTFS system partition without rebooting?

Video tutorial for how to extend system partition with EaseUS Partition Master

Solution 2 - Extend system partition with Windows built-in Disk Management

If you are using Windows Vista, Windows Server 2008 or Windows 7/8, its built-in disk management can extend system partition by "Extend Volume".

Windows Disk Management

Step 1. Go to computer iCon, right-click it and choose Manage.

Setp 2. At the letf side, click Storage and Disk Management.

Step 3. Right click the partition behind system drive and choose Delete Volume.
Now the partition behind system drive becomes unallocated. You need to be sure that the deleted partition does not contain important data. Or you need to move data to otehr partitions firstly.

Step 4. Right-click system drive and choose Extend Volume and click Next.
Then you need to specify the size that you want to add to system partition and click Next. At last, click Finish.

Solution 3 - Extend system partition with Windows built-in DiskPart command

Diskpart command applies to the following Operating Systems:

Operating Systems System partition Data partition
Windows Server 2003 - Support
Windows XP - Support
Windows Vista Support Support
Windows Server 2008 Support Support
Windows 7/8 Support Support

The above Operating Systems built-in Diskpart command can extend system partition when there is continuous unallocated space behind the system partition. Take system partition on disk 0 for example.

1. Click Start and type cmd, then press enter. In the command prompt, type diskpart and press enter.

2. Type list disk and press enter.

3. Type select disk 0 and press enter.

4. Type detail disk and press enter. This will give you a list of all the volumes on the selected disk.

5. Type select volume 0 (system partition) and press enter.

6. Type extend.

The above methods (Solution 2 and Solution 3) can only extend system partition when there is unllocated space behind it. Otherwise, you cannot extend it. If there is no unallocated space behind the system partition, how to extend it? Partition manager software - EaseUS Partition Master can do. It can also be applied to solve other partitioning problems such as to convert fat 32 in Windows XP and Vista.

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