Extend C drive or system partition in Windows 10

Tracy King updated on Sep 12, 2019 to Partition Master | How-to Articles

When the C drive (system partition) is out of space, gets full or you get a low disk space warning, and hardware upgrades become unavailable shown as next image, what are you going to do? 

  • Windows 10 C drive is out of space:

Windows 10 C drive out of space

How to extend C drive or system partition in Windows 10? Follow tips below, you'll learn how to extend partition, especially to increase C drive in Windows 10. 

Tips to extend C drive in Windows 10

There are a few things you can do for extending the C drive or system partition. 

1. Move the print spooler and page file to another drive.
2. You can also merge other partition into C drive for more space.
3. Apply professional partition manager software with Cleanup and Optimization feature can also speed up your slow computer, clean up those junk files and repair Windows system.
This will save you a large amount of space on C drive and other partitions.

All these methods will allow you to free up a significant amount of space on your C drive.

For the users who want to extend C drive with a free and easy method, EaseUS Partition Master Free Edition is the right choice for you.

Let free partition manager software help

As magic partition software, EaseUS Partition Master Free Edition is a FREE comprehensive hard disk partition management software to let you enjoy free with all the powerful functions:

  1. 1. Extend system partition
  2. 2. Resize and Move partitions
  3. 3. Copy Partition/Disk
  4. 4. Create, Deleted and Format partitions
  5. 5. Hide and Unhide partitions and more... 

This freeware works perfectly with hardware even with RAID and supports all Windows Operating Systems. Your data is completely protected during all operations.

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 Windows 10 is supported

Moreover, beside the basic and advanced partition manager features, EaseUS Partition Master also provides powerful partition recovery wizard to recover deleted or lost partition, cleanup and optimization for optimizing hard disk and clean up disk space, wipe data to permanently erase hard drive/partition and so on.

TUTORIAL: Extend C drive or system partition in Windows 10 for Free


Step 1: Launch EaseUS Partition Master

Run EaseUS Partition Master

Step 2: Add space to the System C drive

1. Shrink partition and leave unallocated space for extending C: drive:

  1. Right-click on a partition next to the C: drive and select "Resize/Move".
  2. Drag the end of the partition that is next to the C: drive and shrink it, leaving unallocated space next to the system C: drive, and click "OK".

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

Extend System partition

To add space to the C: drive, drag the system partition end into the unallocated space.

Add space to C drive

Step 3: Confirm to extend system C drive

Click the "Execute Operation" button, it will list the pending operations, and click "Apply" to execute the changes and extend the C drive.

Confirm to extend system C drive
  1. The program may pop up a window to ask you to restart your computer after executing the operation, do as the software requires.
  2. Your computer will restart with a bigger system C drive and better computer performance on your Windows 10 PC.

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Frequently Asked Questions

Why Choose EaseUS Partition Master?

"I've used Partition Master Professional many times to create, delete, format, move, rename, and resize partitions."PCWorld

"Partitioning tools have come a very long since the days of complicated command line utilities and EASEUS Partition Master is one of the most advanced programs available."TECH ADVISOR

"I love that the changes you make with EaseUS Partition Master Free aren't immediately applied to the disks. It makes it way easier to play out what will happen after you've made all the changes."Lifewire

Will the "Migrate OS" feature transfer the Windows system files only or the whole C drive?

To ensure that the migrated system will boot normally, the Migrate OS feature will transfer all the files in the system and the boot partitions. Generally, the boot partition is the C drive so the transfer will include all the files in C.

Does EaseUS Partition Master license apply to multiple computers?

The license of Partition Master Professional and Server editions can be used on 1 computer only, while that for for the Technician and Unlimited editions can be used on multiple machines.

What is the difference between EaseUS Partition Master Trial version and the Free version?

Free is for home users only, with most basic functions available such as partition resize and clone. While trial can help you understand how this product works and test what a full license can do on a business or server OS machine.

Will it cause any data loss after resizing the partition in EaseUS Partition Master?

Generally, it will not cause any data loss or boot issue by resizing a partition. However, in order to protect your data, we suggest that you backup the partition before resizing, in case of any unexpected situations such as power outages, computer hardware failures, etc. You can use EaseUS Todo Backup to backup the partition and its trial version is fully functioned for 30 days.

What should I prepare before resizing the partition?

On the partition that is going to be operated, there might be some files being occupied by other programs. To ensure a successful operation, we suggest that you close all the unnecessary software before resizing that partition. Otherwise, EaseUS Partition Master will detect the partition being locked by the other software and require a reboot to resize the partition under boot mode.

About EaseUS Partition Master

All-round disk & partition management software for personal and commercial use. Let it manage your storage drive: resize, format, delete, clone, convert, etc.