Run Disk Cleanup in Windows 10. Windows 10 Disk Cleanup is a built-in tool that performs a quick. If you want to install the latest bi-annual update to Windows 10 (the spring update or the fall update), check your available hard disk space before, and then after, the update. In this guide, we'll show you the different ways to free up space by deleting the previous installation files after upgrading to the Windows 10 October 2020 Update.

Shortly after the feature update is released, the quality update for that feature update could be as small as a few hundred MB, but as more quality and security changes are implemented, the quality update can increase in size to 1 GB or more.If your PC is short on disk space, you can download and install the quality update after the feature.

Low disk space on C drive is very common issue in Windows 10 computers especially after installing Updates. Few people know how to solve this problem fast and easily. In this article, I'll explain why C drive runs out of space and how to fix Windows 10 Low Disk Space issue with detailed steps.

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Symptom of low disk space in Windows 10

In Windows 10 laptop/desktop, when free space is less than 10%, C drive will be shown as red instead of the default blue bar in File Explorer. which is to alert people fixing this low disk issue as fast as possible.

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When C drive is showing red, you'll suffer from computer performance down. It may stuck when you do some operations, or reboot unexpectedly. In this situation, if Windows 10 download and install Updates, C drive may be full immediately.

When free space reach the threshold, Windows 10 will pop up an notification on bottom right and ask you to turn on storage sense - 'Your PC's low on storage. Turn on storage sense and Windows can help free up space.'

If free space is keep running low, Windows 10 will pop up another notification with message 'Your computer's running low on storage space. Visit storage settings to free some up'.

Why Windows 10 runs low disk space on C drive

Windows 10 low storage space maybe caused by 3 kinds of reasons including:

Virus attack
Display incorrectly
Filling up with junk files

If the computer was attacked by some particular virus, large amount of files will be copied or generated. If C drive has plenty of free space but it becomes full in a short time, you'd better run your anti-virus software to scan.

In previous Windows Vista and Windows 7, some people feedback such issue that C drive usage percentage is showing incorrect, but in Windows 10 this problem seems to be solved, however, it is still a possible reason.

The most possible reason is that C drive is filling up by many types of junk and unnecessary files. Windows 10 download Updates frequently. Temporary, log, hibernation, backup, Internet browser cache also eat up free space quickly. Furthermore, many people install applications to system partition C by default. The more you installed, the less free space left. Many applications for Games, Projects, Videos and Photograph will output very large files. If you do not pay attention, C drive is running low on space very quickly even if you create it very large.

How to fix low disk space issue in Windows 10

After searching by Google, you'll find many similar articles, some articles even provides over 10 methods. Of course you may try all of them, but to fix Windows 10 low disk space issue fast and efficiently, it's enough to complete following 4 steps:

1. Clean up disk to remove junk files

When the low disk space alert pops up, you may turn on storage sense and click the 'Free up storage space' windows to reclaim disk space, or run the standalone Disk Cleanup utility. This Windows native tool is excellent to accomplish the cleanup task.

How to fix low disk space issue with Windows 10 Disk Cleanup tool:

Press Windows and R together on your keyboard, input cleanmgr and press Enter.
Select C: or other drive that is running low.
Click the check-boxes of the files that you want to delete and click OK.
Repeat to Clean up system files.

This step is useful to the computers that never or have not free up space for a long time. By doing this, you may reclaim several gigabyte of free space.

However, free space may be eaten up quickly by new generated junk files. If you cannot get over 10GB free space or if C drive was created small, you'd better enlarge C drive add more free space from other partition.

2. Enlarge C: drive

Hard disk drives are allocated while installing Windows or by OEM manufacturer, but you can change partition size with some tools. Shrink other data partition to release free space and then add into C drive. In this way, there will be more free space in C drive, Operating System, programs and anything else keep the same with before. This step is very important to the computer that use SSD and C drive was created small. Otherwise, you may encounter the low disk space issue on Windows 10 computer again and again.

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3. Remove junk files automatically

Better that all previous versions, Windows 10 has the ability to remove junk files automatically. So, it can keep you C drive always clean.

Windows 10 Upgrade After Install Free Disk Space Windows 10

Firstly, you need to enable this service:

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

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

You have several options:

Select from the list to free up disk space when this partition is running low or every day/week/month.
Then you can select whether delete temporary files automatically.
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.

4. Change location for new files

Some types of files such as apps, documents, music, pictures, and videos are not junk but could use large amount of free space.

As another wonderful feature, Windows 10 can save new files of these types to other partition.

Press Windows and X on keyboard, then click Settings
Click System> Storage.
Click Change where new content is saved