How to free up disk space on Windows 10

Updated on: May 17, 2019

This article introduces how to free up disk space on Windows 10 (32 & 64 bit) with Disk Cleanup tool and additional methods.

Many people feedback that system C drive becomes full after upgrading to Windows 10 or install some Updates. This is because many large files downloaded and wrote into C drive. In fact, system partition is filling up by many types of files continuously, so it runs out of space sooner or later if you don't take care. It's more likely to encounter this issue if you use SSD, because it is much smaller than traditional mechanical hard disk.

In this situation, you can remove the unnecessary and junk files to reclaim disk space. In this this article, I'll show you how to free up disk space on Windows 10 with native Disk Cleanup utility. To fix the low disk space issue permanently, you'd better also complete the additional steps.

How to free up space with Disk Cleanup

There are many third party system optimization software that can help delete the junk files, but Windows 10 built-in Disk Cleanup is enough in most cases. From Windows XP to the latest Windows 10, I always use this utility to free up disk space. It is easy to use, runs fast, and is able to clean up most common types of unnecessary files. The most important aspect, it is safe.

Steps to free up disk space with Windows 10 Disk Cleanup:

Step 1: Press Windows and R on the keyboard, type cleanmgr and press Enter.

Launch Disk Cleanup

Step 2: Select C: drive or any other one from the drop-down list and click OK.

Select drive

Step 3: Click the check-boxes in front of the files that you want to remove. Read the associated description on bottom before clicking OK if you do not know what files are included.

Select files

Step 4: Click Delete Files to confirm in the pop-up window.


Disk Cleanup will begin cleaning up, the time depends on your computer performance and the amount of files.

Clearing up

Step 5: Repeat to Clean up system files.

If you never or have not free up disk space on Windows 10 for a long time, Disk Cleanup may help you regain several GBs of disk space. To get more, you may try the additional options below.

8 options to help reclaim disk space

1. Uninstall apps

You may uninstall some apps and games that you no longer use or that came preinstalled on your computer from the manufacturer. Steps:

  1. Press Windows and X on keyboard, then Settings
  2. Scroll down in Apps & features
  3. Click the items that you want to remove and click Uninstall.

2. Move installed apps and games

All programs are installed to system C: drive by default, the more programs you installed, the less free space left. If you do not want to uninstall the programs, Windows 10 has new feature to help you move to other partition.

  1. Press Windows and X on keyboard, then click Settings > Apps > Apps & features
  2. Click an app or game.
  3. Click the Move bottom.
  4. Select the new location from the drop-down list.
  5. Click the Move button.
  6. Repeat the steps to move more items.

Move Apps

3. Move files/folders

Another option is moving specific files/folders to other volume, steps:

  1. Open Windows File Explorer.
  2. Select the the files/folders that you want to move.
  3. Click Home menu on the top > Move to > Choose location.
  4. Select the target location and click the Move button.

Move files folders

Select location

4. Reset Recycle Bin

All files that deleted by pressing DEL without SHIFT key will go to Recycle Bin, where you can revert these files to original location manually if you deleted them by mistake.

When system C drive is almost full, you may consider decreasing the disk space or change the location for Recycle Bin. Steps:

  1. Right click Recycle Bin in Desktop and click Properties.
  2. Select a drive for Recycle Bin.
  3. Select Customer size and enter an amount.

Reset Recycle Bin

5. Reset Paging File

Paging file uses part of disk space as virtual RAM and it is located in C drive by default. You can decrease it or change it to other partition.

  1. Press Windows and R on keyboard to start Run.
  2. Type sysdm.cpl ,3 and press Enter.
  3. Click Settings under Performance in Advanced tab.
  4. Click Change under Virtual Memory.
  5. Uncheck Automatically manage paging file size for all drives on the top.
  6. Select D: or other drive, enter amount of Initial size and Maximum size in Customer size radio box, and then click Set.
  7. Select C: drive and select No paing file radio box, then click Set.
  8. Click OK. (It may requires reboot to take affect)

Reset Page file

6. Reset System Protection

System Protection is another Windows built-in backup feature that is able to create system restore point. These restore points are created automatically by Windows when some operations are made to disk drive, and roll back the system to a recent state when you need. This feature reserves quite a big disk space for its functionality.

You can free up disk space by reducing disk space usage, steps:

  1. Press Windows and R key to launch Run, type sysdm.cpl ,4 and press Enter.
  2. Select C drive and then click Configure
  3. Sliding towards the left to decrease the Max Usage of disk space.

System protection

7. Reset Hibernation Setting

Hibernation is a feature that saves the content in memory to the hard drive allowing you to shut down your device completely without losing your current session. Hibernation is a useful feature but it requires several gigabytes of space to save the content to hiberfil.sys file in C drive.

You can free up disk space by deleting the hibernation files or reduce the size of hiberfil.sys, steps:

Search cmd on task bar on bottom left corner of the screen, right click Command Prompt and choose Run as administrator.

To reduce hiberfil.sys file:

Type powercfg -h -size 50

The size will be changed from default 75% to the minimum 50%

if you receive error that "The system firware does not support hibernation", then you cannot use these commands.

To delete hibernate:

Type powercfg.exe -h off

Hibernate mode will be disabled and any associated saved data from previous hibernations will be deleted automatically.

If you want to enable it:

Type powercfg.exe -h on

8. Compress files

Compact OS is a tool introduced with Windows 10 that allows you to compress the installation files and built-in desktop applications reducing the footprint and freeing up space.

This operation won't affect computer performance, but it will modify system files. This operation is only suggested when disk space is extremely low and you have no other choice.

  1. Search for Command Prompt and run as administrator.
  2. Type the command: Compact.exe /CompactOS:always

You can revert the changes using the command: Compact.exe /CompactOS:never

Generally speaking, you'll get several to over 10GB free space after completing the steps above. However, there is still an issue: new junk and some necessary files are continue to be saved in C drive. So, free space will be eaten up.

Additional steps after freeing up disk space

1. Save files to new location

Windows 10 has new option to save new files of apps, documents, music, pictures, and videos to other place, steps:

  1. Press Windows and X on keyboard, then click Settings
  2. Click SystemStorage.
  3. Click Change where new content is saved under More storage settings.
  4. Click the drop-down list to select new location and click Apply.

Change location

2. Free up disk space automaticalyally

Storage Sense is a relatively new feature in Windows 10 that users may enable to free up disk space automatically when the drive is running low on space.

Firstly, you need to enable this service:

  1. Press Windows and X on keyboard, then Settings
  2. Go to System > Storage
  3. Switch Off to On under Storage Sense on the right side.

Storage sense

Then click Change how we free up space automatically below it.

You have several options:

  1. Select from the list to free up disk space when this partition is running low or every day/week/month.
  2. Then you can select whether delete temporary files automatically.
  3. Select from the drop-down list to delete files in Recycle Bin and Downloads folder if they have been there for over 1/14/30/60 days.

Free up automatically

3. Expand C drive as large as possible

The final step - enlarge C drive. This is very important to the computers that C drive are created small. Similar with the smart phone, if it is 16GB, it asks you to free up frequently, but if it is 256GB, you won't encounter the low space issue for a long time.

With NIUBI Partition Editor, you can transfer unused space from other partitions to C drive without losing data. Operating System, programs and associated setting, as well as anything else keep the same with before.

Download it and follow the steps in the video to expand C drive.

Video guide