[Really Working] Transfer Disk Space from One Partition to Another in Windows 10/8/7

Brithny updated on Sep 16, 2020 to Partition Manager | How-to Articles

Part 1. The Two Partitions are on the Same Disk
Part 2. The Two Partitions are Not on the Same Disk

When you are trying to store a large amount of data on your computer or laptop, you may find the partition space is not enough for you. However, there are lots of free space on other partitions, so you may wonder if it is possible to transfer one partition's free space to another so as to enlarge the partition space in Windows 10/8/7. 
For example, transfer free space to E drive, or transfer free space on F drive (on disk 1) to D drive (on disk 0). We indeed could help! Follow the two parts below to move free space from one partition to another now.

Part 1. The Two Partitions are on the Same Disk

If the two partitions are on the same disk, it would be a piece of cake to transfer free space to another partition. For example, if you want to transfer D drive's free space to C drive, or move any partition's free space to another drive, you can follow these simple steps to realize it.

To transfer or move free space to another partition is pretty easy if you have a free partition tool. EaseUS Partition Master Free provides a feature named "Resize/Move partition" can help us transfer free disk space from one drive to another directly, for example, move free space from D to C drive in clicks

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 Windows 10 is supported

You can only allocate the unallocated space from one partition to another. If you don't have unallocated space, resize partition first.
EaseUS partition software has the most welcoming and versatile hard disk partition management features on MBR and GPT disk.

Then, you can follow the steps below to extend one partition.

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

You will successfully move unallocated or the free disk space to C drive or any other partition in Windows 10/8/7 and get a bigger partition.

Easy and fast, in three steps, the free space is magically transferred from the big drive to the smaller one. 

Part 2. The Two Partitions are Not on the Same Disk

What if the two partitions are on different disks? For instance, the free space is on disk 0 while the E drive or D drive is on Disk 1. So, here comes the second part. To transfer or move free space or unallocated space to the other partition (on a different disk), you must covert your basic disks into the dynamic disk and then move the free space.

EaseUS Partition Master does not support cross-disk expansion for C drive, system partition,and boot partition. Only data partitions are allowed for cross-disk expansion.

Step 1. Convert Basic into Dynamic

  • Launch EaseUS Partition Master and right-click one of the disks (disk 0, disk 1 or disk 2) that you want to merge, choose "Convert to Dynamic".
choose the first disk and convert to dynamic
  • On the home menu, click "Execute Operation" to confirm the disk conversion from the Basic to Dynamic.
click apply to convert to dynamic
  • Select the other disk (with lots of free space) and convert it to a dynamic disk in the same way.
convert the second disk into dynamic
  • When both of the disks have been converted into dynamic disks, as shown below, you can follow Step 2 to merge free space from one disk to another now.
convert the second disk into dynamic

Step 2. Merge Two Disks into One Disk

Note: The other dynamic must be unallocated space. If it's not, delete all the partitions on it. What's more, you cannot merge a system partition even you have converted to dynamic.

delete disk

Select the full disk, right-click on it and choose "Resize/Move".

choose the disk and resize

Use your mouse to drag the partition panel rightward or leftward to extend partition size.

Sometimes, the unallocated space is on the left of the partition you want to extend. If you want to move unallocated space, just drag the left partition handle leftwards to the size you want.

resize the disk

Click "Execute Operation" and you are able to merge space from one disk to the other.

merge two disks space into one

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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.

Video Tutorial

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