How to increase partition space by extending in Windows 10

It may so happen that you might need to increase your partition size of an existing drive. One option is where you get a new hard disk, but if you have enough space on the primary drive, you can increase/decrease the size to create more space. In this post, we will suggest how to increase Partition space or hard disk space by extending feature in Windows 10

How to increase partition space by extending in Windows 10

I will start with an example. Let’s assume you have 20 GB free in D drive and 10 Gb free in another, but the total occupied data is only 10 Gb.  It means you can eventually transfer data from one drive to another using some File Copy Tool like Robo Copy and add the rest of the space to drive where you need it most.

If you have a brand new machine where you don’t have any data on your hard drive, delete and recreate partitions instead of messing with the Extend Partitions fundamentals. That would be a lot easier.

That said, let’s understand a few aspects you should know even though we are just talking about increasing partition size.

  • What is Shrinking of Partitions?
  • What is Extending of Partitions?
  • How to extend the size of the existing partition

What is Shrinking of Partitions?

You can reduce the amount of space in any hard drive so you can squeeze out free space. But before doing so, you will need to defragment your hard disk. It is required for best results and is something like cleaning up room to put things at their place, so the room has more space.

To perform regular defragmentation, you can use Windows De-fragment Scheduler or Tools like MyDefrag or Defraggler.

What is Extending of Partitions?

Extending of partition is like using the free space to increase your room area. Technically you can extend a partition space by adding some free space. Remember its not merging of partitions. That is different.

How to increase the size of the existing Partition in Windows 10

Basic Requirement

  • You will need an admin account to complete the task.
  • You need to have Free Space to extend any partition.
  • Free Space section should be on the right of the partition you want to extend.

Extend Shrink Restriction

For the example below, I am calling the partition you want to expand as X.

Step 1: Understand the physical arrangement of your partition

Launch the Windows Disk Management tool by searching for partitions tool in the control panel. You can also type diskmgmt.msc in the Run prompt, and hit enter. The tool displays a list of connected hard drives and partitions. Total Size, free space, status, file system, etc. are listed.

Since we are merging, extending, etc., make sure that you understand how partitions are ordered. Imagine it like a stack of bread on top of each other except that you can pull it out and replace it.

Step 2: Manage Files and Plan your space

  • Find your exact requirement: How much space you want, existing partitions space, their free space, etc.
  • Start moving files from one partition to another so that you create free space which can be used by the partitions which need expansion.

Remember you can only extend a partition if there is a free space in the right.

Step 3: Create Free Space

Once all your files are moved, create free space if you don’t have from existing Partition or Volume. The free space is displayed with Green Color.

  1. Select a volume which is on the right of X and next to it.
  2. Right-click and click on Shrink Volume.
  3. Key in the amount of space you need to add to X.
  4. Once this is done, you will see Free Space on the right of X.

Shrink Volume in Windows

Step 4: Extending the Volume

  • Since you have free space, Right-click on X and Select Extend Volume.
  • Select which disk partitions you have listed in the screen and add them.
  • Next and you will see a summary and the partition will be merged with free space.

Extend Volume Wizard Windows

One thing I did not warn you as about backing up the data in the partition you plan to extend. Its not required most of the time as the data will be not lost at all. I had tried it with almost like 20 GB of data and nothing went off the disk.

However, if you are worried about data and even, we would suggest, Backup your data but then if you can spend time on backing data then creating free space is all hassle, just backup and recreate everything from fresh.

Also, there is a concept of Dynamic Disk which lets you extend partition space across disks, i.e., two or x number of the hard drive. It is handy as are not restricted by the physical location of your volume.  We will talk about it in upcoming posts.

As a summary, depending on how much data you have decided what suits you best.  Extending is a great option and use it when you get a chance.


About Ashish Mohta

A Professional Tech blogger, Editor and Writer who talks about solving day to day problems of people who use computer. His expertise are in Windows 7, Microsoft Office, Software, Mobile Apps and Video Posts.

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