How to fix Windows 10 low disk space issue?
Symptom of Windows 10 low disk space
When a drive especially for system C drive is running low on disk space, you’ll see a red bar instead of the default blue bar in File Explorer. If the free storage space is less than 10%, C drive is showing red, which is to alert people fixing this issue as fast as possible.
When C drive is showing red, you’ll see the computer performance drop. 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.
Many types of files keep writing into C drive, if you do nothing, Windows 10 will pop up a small window 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 storage space is keep running low, Windows 10 will pop up another window and ask you to free up storage space.
Why low disk space in Windows 10
Windows 10 low storage space maybe caused by several reasons including:
- Virus attack
- Display incorrectly
- C drive runs out of space
If the computer was attack by some virus, large amount of files will be generated. If C drive has plenty of free space but is filling up in a short time, you’d better run your antivirus software to scan.
In previous Windows such as Windows Vista and Windows 7, many 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 free space of C drive is eaten up. Windows 10 download Updates much more frequently than all previous versions. Besides Windows Updates, many other types of files such as temporary, cache, log, hibernation, backup, internet browser also eat up free space quickly. Some people install and use all applications by default setting. Have you noticed Games, Projects, Videos and Photograph programs? They are in very large size and output large files, too. If you do not pay attention, C drive runs of space very quickly even if you use very big hard disk.
How to fix low disk space issue
In one word – increase C drive free space, there are several ways:
- Transfer files
- Free up disk space
- Expand C drive with free space in other volume
This step is very useful if you install Games, Projects, Videos and Photograph programs in C drive with default settings. Change the default output location to other volume with plenty of free space, and then transfer the output files to new locations.
Free up disk space
This step is useful for the computer that never did this. Turn on storage sense and click the “Free up storage space” alert to reclaim disk space. However, the new way in Windows 10 to free up space seems useless. You may try old way like this:
- Open File Explorer
- Right click C drive and click Properties.
- Click Disk Cleanup.
- Select the files you want to delete and click OK to free up.
- Clean up system files in the same window.
Expand C drive
If you cannot reclaim plenty of free space, you’d better extend C drive with free space in other volumes, otherwise you’ll see the low disk space issue in near future.
Watch the video how to resize volume and extend C drive without reinstalling Windows.
When disk space is running low on Windows 10, to fix the low storage space issue, 3 steps: transfer files to other volume, free up disk space and expand C drive with free space in other volumes.