6 Ways on How to Expand or Extend Windows 7/8/10 Partition without Data Loss

Jean updated on Sep 04, 2020 to Partition Master | How-to Articles

Microsoft has announced it is going to completely Windows 7 by Jan.14th, 2020. Windows 7 fans can no longer get services from Microsoft then. 

Problems like "Windows 7 becomes slow", "C drive is out of space"  or "Windows was unable to complete the format", etc. will accumulate and affect people's life. 

EaseUS software has collected 6 ways to help you extend partition in Windows 7/8/10. Most solutions can also be applied to expand the system partition. Go through this page and find the best method to expand your partition in Windows 10.

Part 1. Extend Partition with Unallocated Space (2 Ways)
Part 2. Expand Partition without Unallocated Space (4 Methods)
Open Disk Management and check if there is unallocated space on your disk.
If yes, go to Part 1 and find the right solution. 
If not, go to Part 2 and use the provided methods for help.

Part 1. Extend Partition with Unallocated Space

In this part, we'll offer two tools to help you extend Windows 7 partition with existing unallocated space - Disk Management and free partition manager software.

Way 1. Extend Windows 7 Partition with Adjacent Unallocated Space

Please note that there must be unallocated space behind the partition which you want to expand with Windows built-in Disk Management utility.
Otherwise, you might find that the Extend Volume option is greyed out and not available.
In this case, free partition manager software in Way 2 can expand partition with non-adjacent space.

See the detail steps on how to expand your partition with adjacent Disk Management:

Step 1. Right-click My Computer and choose Manage -> Storage -> Disk Management.

Step 2. Right-click on the partition that you want to extend, and choose "Extend Volume" to continue.

extend windows 7 partition

Step 3. Set and add more size to your target partition and click "Next" to continue. 

Extend Windows 7 partition with Disk Managenent.

Step 4. Click "Finish" to complete the process.

Way 2. Expand Partition with Non-adjacent Unallocated Space

If the unallocated space on your hard drive is not next to your target partition, don't worry. As Disk Management can't move a partition or unallocated space location, as a result, you cannot directly add non-adjacent free space to your target partition.

Free partition manager software like EaseUS Partition Master Free with its resize/move feature can help.

Download Now

 Windows 10 is supported

With this freeware, you can directly merge non-adjacent space and extend target partition with ease.

Note: Skip Step 1 and start with Step 2 if your hard drive already contains unallocated space. 


Step 1: Launch EaseUS Partition Master

1. On the main window, right-click on the partition that you want to merge space to another and select "Delete".

Delete partition for merging non-adjacent partitions

2. Click "OK" to confirm. The deleted partition will display as unallocated.

Confirm to delete partition

Step 2: Move the unallocated space next to the target partition

1. Right-click on a partition next to the unallocated space and select "Resize/Move".
2. Drag the selected partition forward or backward, moving the unallocated space toward the target partition, and click "OK".
Repeat 1 and 2 until the unallocated space is moved next to the target partition.

Move unallocated space to the target partition

Click the "Execute Operation" button and "Apply" to keep all changes.

Step 3: Merge partitions

1. Right-click on the target partition that you need to add space to and keep, select "Resize/Move".

Add unallocated space to target partition

2. Drag the target partition handle into the unallocated space and click "OK".

Merge non-adjacent partitions

3. Click the "Execute Operation" button and click "Apply" to keep all changes.

Keep all changes

If two partitions are separated by unallocated space, right-click on one partition (you want to keep) and select "Merge" > Select another partition and click "OK" > Keep all changes by clicking the "Execute Operation" button and "Apply".

After this, you've successfully moved and added the unallocated space to your Windows 7 partition. If you don't have any unallocated space on your hard drive, what will you do to increase the target partition size? EaseUS Partition Master can help you. It allows you to increase C drive by moving space from another drive, such as D drive. Watch the video guide below.

Part 2. Extend Partition without Unallocated Space

When your hard drive doesn't have free unallocated space for extending partition, relax. In this part, we've collected 4 practical methods for you to apply and increase your partition size.

Method 1. Shrink or delete the adjacent partition

When there is an adjacent partition which is empty or contains enough free space on your hard drive, you can follow this method for a guide:

First. Delete or shrink the adjacent partition

Open Disk Management, locate the partition next to your target one, and check its state:

  • If the partition is empty, right-click on it and select "Delete Volume" > Click "Yes" to confirm.

Delete partition to free up space.

  • If the partition is not empty but has big enough space, right-click on it and select "Shrink Volume" > Enter the amount of space that you want to shrink and click "Shrink" to confirm.

Shrink partition to leave unallocated space.

Next. Expand partition with left unallocated space

To do so, you can move back to Method 1 in Part 1 and use Disk Management for help.

Or you can also apply free partition manager software - EaseUS Partition Master Free for help with below steps:

Download Now

 Windows 10 is supported

Step 1. Launch EaseUS Partition Master on your PC.

Step 2. Free up space to extend partition.

If the hard drive has enough unallocated space to extend the target partition, jump to Step 3, and continue. If not, free up space first:

  • Right-click on a partition next to the target partition and select "Resize/Move".
  • Drag the partition ends to free up space, leaving enough unallocated space behind the target partition, click "OK".
free up disk space to get unallocated space

Step 3. Extend partition.

  • Right-click on the target partition and select "Resize/Move".
extend partition -1
  • Drag the target partition handle into the unallocated space to extend partition.
extend partition -2

Step 4. Keep all changes.

  • Click the "Execute Operation" button and click "Apply" to keep all changes.
extend partition -3

Method 2. Free Up Target  Partition Space - Delete Junk Files/Useless Large Files

The target of this method is to extend the current usable space without changing the partition state on your hard drive.

To do so, you can use a disk cleaner software or thrid-party tool or help. Here, you can directly use EaseUS Tools M with its System Cleanup and Large File Cleanup features for help:

#1. Clean Up Junk Files from System C Drive:

Step 1. DOWNLOAD and install EaseUS Tools M. Select "System Cleanup" on the main screen.

click system cleanup

Step 2. Select the type of junk files you want to scan and click "Analyze".

analyze junk files

Step 3. Identify and select useless files and click "Clean up" to remove those files from your PC or laptop.

click clean up to remove junk files

#2. Delete Useless Large Files:

Step 1. DOWNLOAD EaseUS Tools M for free and install it on your computer.

Step 2. Launch EaseUS ToolsM in Windows PC. Select "Large File Cleanup" on the main screen.

large file cleanup - 1

Step 3. Select the drive and click "Scan" to let the program locate, find all large files on your disk.

large file cleanup - 2

Step 4. Identify and select useless large files and click "Delete" to remove those files from your PC or laptop. A message tells you this process will permanently delete the files, click "Yes" to start the process.

large file cleanup - 3

Note: During the cleaning process, please check the scan result carefully before you decide to delete them on Windows 7.

Method 3. Extend Partition with Free Space on the Second Hard Drive

Required: At least two hard disks installed on Windows 7.

If you have two or three disks, and the second or the third hard drive contains enough free and unallocated space, congratulations. You can add space from the second or third disk to your target partition on the current disk.

To do so, you need to convert two basic disks into dynamic. You can refer to this link to complete the whole process: Merge Disk 0 and Disk 1

1. This method only works to extend data partition by adding unallocated space from the second disk. 
If you want to use free space on the second disk to extend your system partition, we are sorry that this method can't work.
2. After converting two disks into dynamic, remember to right-click the target partition that you want to extend and select "Resize/Move". And follow the introduced tutorial page to finish the process.

Method 4. Clone and Replace Old Drive to A Bigger One

Required: A new and bigger hard drive, a free disk cloning software

To do so, you'll need to buy a new and bigger hard drive in advance. And then use a disk cloning software to clone and replace the old hard drive with the bigger one.

Here, we'd like to recommend you use EaseUS Todo Backup Free for help. You can check and follow the tutorial steps below to replace your hard drive to a bigger new one now:

Step 1. Open your Windows 7 computer case, connect the new hard drive to your computer via a SATA or ATA cable correctly.

(Make sure the computer can detect your new drive.)

Step 2. Follow the video tutorial to clone and upgrade your old hard drive to a new bigger one:

Step 3. Restart Windows 7 if necessary and follow solutions in Part 1 to extend partition with free unallocated space in the new hard drive.

To Sum Up

This page includes 6 ways of helping you extend Windows 7 partition when the hard drive has or has no unallocated space.

When Windows 7 hard drive contains unallocated space, you can refer to Part 1 and apply Disk Management or free partition manager software - EaseUS Partition Master Free for help.

When the hard drive doesn't have unallocated space, you can refer to Part 2 with provided methods for help. 

Note that solutions on this page can also help you increase partition size on other Windows systems, including Windows 10, 8.1,8 and old Windows XP/Vista. 

Was This Page Helpful?


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.

Video Tutorial

How to Partititon a Hard Drive on Windows 10/8/7