Is it safe to lớn use the Disk Cleanup Compress your OS drive option lớn get miễn phí space when the C drive space is running out? In this post, MiniTool answers the question, shows the information about Compact OS, và offers other ways to help you get more không tính tiền disk space.

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Compress Your OS Drive Windows 10

According to lớn users’ reports on Google, they saw the Compress your OS drive option listed under the Files to delete section when conducting Disk Cleanup.


When your C drive sầu is running out, you may launch Disk Cleanup & then you may find “Compress your OS drive” in the list.

As you can see in the above sầu image, it seems that checking this option can không tính tiền up about 10GB disk space & then you can get rid of running out disk space. However, the truth proves that it is not worth compressing your OS drive to không tính phí up space.

We have sầu gathered 4 common questions related lớn Compress your OS drive sầu Windows 10 from Google. After learning about the 4 questions, you may know whether it is worthwhile lớn kiểm tra Disk Cleanup Compress your OS drive sầu.

4 Questions Related khổng lồ Compress Your OS Drive

Q 1: What is Compress your OS drive?

“Compress your OS drive” is not a tệp tin but an option you can kiểm tra to free up your C drive. But this option shows up in the February 2019 Windows Updates, without appearing in the previous versions.

Q 2: What does Compress your OS drive sầu do?

“Compress your OS drive” uses the newly introduced compression algorithms XPRESS and LZX in Windows 10’s NTFS.

After checking this option under Disk Cleanup, the files in C drive sầu will be compressed (you will find blue arrows against every thư mục you have) & then you can get some miễn phí space.

Q 3: Is it safe to lớn use Compress your OS drive?

It is safe lớn use “Compress your OS drive” khổng lồ không tính tiền up disk space. This option will not delete any files on your hard drive sầu, so you vì not worry about data loss.

Q 4: Should you compress your OS drive? Can I delete Compress your OS drive?

The reason why we list these two questions together is that they are the same. Let’s see the answer to lớn these two questions.

If you have a computer with a faster CPU, you can probably kiểm tra this option as your CPU can keep up with the decompression & compression.

But the truth is that even if you use quite fast CPU on your computer, the CPU may be busy when it comes to read và write files.

The reasons are that the files in C drive sầu are compressed and it needs time khổng lồ decompress these files when your Windows OS calls them. After using them, it also takes time to lớn compress these files again. This is time-and-power-consuming & may slow down your computer (check other reasons for a slow computer).

Therefore, it is highly recommended you should not không tính tiền up disk space by using Disk Cleanup Compress your OS drive due to lớn the influence on computer performance.

If you have used this option lớn miễn phí up space, there is a way khổng lồ decompress your OS drive sầu.

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Here is the tutorial on restoring your OS drive khổng lồ its previous state: 

xuất hiện File Explorer, find C drive sầu, và right-cliông xã it.Select the Properties option in the right-click menu.Navigate lớn the General tab, and then uncheck the Compress this drive sầu khổng lồ save disk space box. Click the Apply and OK button to confirm and execute the changes. You need to wait for about 10 or more minutes (the time depends on how many files và folders you have) và it will be completed.


You may have noticed Compact OS on website. Is it different from Disk Cleanup Compress your OS drive?

Is “Compact OS” the Same as “Compress Your OS Drive”?

Compact OS is also a new feature on Windows 10. Using this feature, you can reduce the kích cỡ of the operating system và you can also run it from compressed files, similar lớn WIMBoot.

Further reading:

WIMBoot (Windows Image Boot) is a feature in Windows 8.1. This feature is designed for Windows users to lớn save space on devices with power memory. This tool just decompresses the files as and when needed & then again compress them back lớn the INSTALL.WIM.

The Compact OS feature is both supported by the UEFI- & BIOS-based devices (UEFI vs BIOS). Furthermore, it can significantly lower the OS footprint và this makes it easy khổng lồ install & have some space left over for other software in low disk space devices.

But is “Compact OS the same” as “Compress your OS drive”? Will the computer performance become poorer after using the former?

For these two questions, there is no doubt that Compact OS will also impact performance when the computer reads và writes lớn its system files or Windows apps. But according to lớn a user’s feedbaông chồng, Compact OS does not hit the performance much as he benchmarked his Dell XPS 13, Broadwell edition before và after enabling this feature. Therefore, it could be said that these two features are not the same.

Considering that you may be in the dilemma that your C drive is running out, we offer you some ways of freeing up C drive in the following nội dung. You can try any of them.

Free Up C Drive sầu Space by Compressing This Drive

According to the above sầu nội dung, you have known that the Compact OS feature can help you save disk space with negligible influence on computer influence. You may have an interest in using it. But please note that this feature will cause disk fragmentation. So, it is not recommended you lớn use this feature if you are using an HDD.

To use Compact OS lớn miễn phí up disk space, you should follow the instructions below:

Type cmd in Cortana’s search bar and then select Command Prompt. Right-cliông xã it & then choose Run as administrator.On the cmd window, type compact/compact OS:always & then hit Enter to exexinh tươi this command.This process will require about 5 minutes. Do not shut down your computer unless the process comes to lớn an kết thúc.

If you don’t use this feature anymore, you can type compact /compactOS:never to lớn switch it off.

Free up C Drive Space by Removing Files

The second way you can get không tính tiền space lớn C drive sầu is removing files. Apart from deleting the temporary files, you can also try deleting the large và unnecessary files or moving files lớn another location.

Delete Temporary Files via Disk Cleanup:

Clichồng This PC on your desktop and then select the Properties option after tight-clicking C drive sầu.Cliông chồng the Disk Cleanup button và then check the files you won’t need in the new window. 

Remove Large Files from C Drive:

To find large files saved on your C drive with ease, you can refer to lớn the methods mentioned in the following recommended article. Furthermore, it also shows you what large files you can delete without any potential damage.

How to lớn Find Large Files Taking up Hard Drive Space on Windows 10

You may find the hibernate tệp tin taking up a large space on your C drive sầu if you have sầu enabled the Hibernate mode. This file is created by OS when computer goes into lớn the Hibernate mode. You can directly delete the hibernation tệp tin if you don’t need the Hibernate mode anymore, or reduce the form size of the hibernation file to remain this mode on your computer. 

Move Files to lớn Another Location:

If there are lots of pictures, audios, và videos on C drive, you can move them to lớn another location khổng lồ không lấy phí up space.

Open File Explorer, select C drive, and then select the files you want lớn move.Go to lớn the Home tab on the ribbon. Select Move to và then Choose location. Select the target location from the các mục và then select Move.


Free up C Drive Space by Enlarging This Drive

Apart from removing files from C drive sầu, you can also try enlarging the space of C drive sầu. After enlarging C drive, your C drive has enough không tính tiền space and your computer can run faster than before.

To enlarge C drive sầu safely và easily, you can utilize the không lấy phí & reliable program – MiniTool Partition Wizard. This program offers two features, that are Extend Partition & Move/Rekích cỡ Partition, khổng lồ help you modify the partition kích thước with ease.

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Now, let’s see how to modify the form size of C drive sầu by using these two features respectively.