Fix C Drive Filling Up Automatically for No Reason

Jean updated on Sep 16, 2019 to Backup Utility | How-to Articles

Why C: Drive keeps filling up randomly?

"I had upgraded to Windows 10 about two months ago. But recently, I noticed that my C drive appears to bloat over time with 'low space' warnings constantly. Then I deleted some duplicate files, documents and applications to free up about 50 GB, but, it rapidly fills up again. It seems that something eating up my hard drive. I don't know what causes the problem. Is there any advice about how to fix C drive keeps filling up automatically without reason?"

Reasons and Solutions for C Drive Keeps Filling up Automatically 

You can find the common reasons and solutions to C drive keeps filling up automatically in the following articel. 

Windows Restore Points 

Windows Restore Points are effectively mini 'backups' of the operating system and are usually created when you install a driver or use Windows Update. It is helpful for disaster recovery but can also eat a tremendous amount of disk space and cause C drive filling up the problem over time. This phenomenon is frequently seen in Windows 10 and it is one of the main reasons for Windows 10 C drive full issue. So I highly recommend you to disable the Windows System Protection, clear all the local restore points and then create a system backup image on the external storage device with EaseUS Windows backup software. It is the best way to save disk space and avoid hard drive keeps filling up the issue.

To clear local restore points, you can follow these steps: 

Open the System Control Panel applet (shortcut: press [Windows]+[Pause/Break]), click System Protection in the sidebar on the left, select C:, click [Configure], and click [Delete].

EaseUS Windows backup software is a professional backup utility coming with lots of flexible and advanced features. It allows you to automatically backup your system, files, hard drive, and Outlook Emails, etc to an external storage device. In this case, it is quite helpful to save hard drive space. To backup system partition with EaseUS Workstation backup software, please refer to How to Backup System with PC Backup Software.

Other Possible Reasons and Solutions for C Drive Keeps Filling up Issue

Except for Windows Restore Points, there are some other reasons that can eat away at hard drive space and cause C drive filling up the problem: 

  • File system corruption 
  • Temporary and Cached Files
  • Volume Shadow Copy Service
  • Virus attacks

When the file system gets corrupted, it will report the free space incorrectly and cause C drive filling up the problem. You can try to fix it by following steps: open an elevated Command Prompt (i.e. Run as Administrator), execute "chkdsk C: /f /v /x", agree to a schedule for reboot, and then reboot your computer, and let it scan while it reboots.

If you don't have any technical know-how and want to minimize data risks, using third-party software could be a better choice. The Command line is suitable for computer professionals since wrong commands can cause severe problems. Therefore, we strongly recommend you to try an automatic command line alternative.

EaseUS Tool M is a practical computer fixing tool that is safe and light-weighted. It's a perfect alternative to CHKDSK command. Use this one-click tool to solve your computer issues.

To fix file system error or disk error:

Step 1: DOWNLOAD EaseUS Tool M for Free and install it.

Step 2: Open the software and select "File Fixing" on the left pane. 

On the right pane, choose the drive and check off the box at the bottom - "Check and fix file system error". Then, click "Fix" to start repairing the error.

Step 3: Wait until the operation completes. Wait until the operation completes. After the operation completes, click the "View" button to check the drive. 

select the drive and check off file system error

Many programs use temporary and cached files that are stored on the hard drive. Over time, this can eat up a lot of space if you don't clean out your temporary directories. You can free up temporary and cached files from within Windows by accessing the Disk Cleanup. 

1. Click Start and then type in "Disk cleanup" (no quotes).
 
2. Wait for the Disk Cleanup icon to appear, and then click it.
 
3. A new window will appear. Choose the C drive from the drop-down list.

4. Windows will analyze the drive; the "Disk Cleanup" window will appear.
 
The first tab labeled "Disk Cleanup" allows you to remove temporary files. The second tab allows you to delete Restore Points and Volume Shadow Copies, including older Windows backups. Both of these options can save a significant amount of space.

They are all the possible reasons and solutions that might cause C drive filling up by itself problem. I hope at least one of them are helpful!

 
 

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Frequently Asked Questions

What is the difference between Clone and Backup? In what cases should I use Clone?

Clone will copy one disk to another or one partition to another (unallocated space is also supported). Usually, this option is used to upgrade the current disk by creating an identical copy. Backup will generate a .PBD image file containing the selected files or system that can be restored from the .PBD image if needed.

What is the difference between System Backup and Disk Backup?

System Backup will auto-select the system boot related partition(s) as the backup source to make sure the system image can be restored properly. Disk/Partition Backup will allow you to manually select a whole disk or speficy a certain partition as the backup source. You will get the same backup result as System Backup if you manually select the system and boot partitions with the Disk/Partition Backup option.

As a computer newbie, what features should I use to protect my computer?

You can use System Backup to back up the system and boot partitions, use Disk/Partition backup to back up the data partition and add plans to run an automatic backup. If you use the computer frequently or have software that may cause boot failure of the computer, we would suggest you back up the computer every 1 to 2 days. For other situations, you can backup the computer once a week. In addition, you can schedule File Backup to back up the files which are changed frequently.

What kind of storage service should I use to save my backup images?

EaseUS Todo Backup can save backup images to internal disks, external disks, network drives, or free cloud(Google Drive, Dropbox, and OneDrive) and CD/DVD. It is suggested to save the images to the internal/external/network drives to save time as those kinds of disks have a better read-write speed. It is suggested NOT to save the image on the source disk, because once the disk is damaged, all the files on the disk will become unavailable and you will be unable to restore the image.

As a company network administrator, what features should I use to protect our internal computers?

It is recommended that you use the SQL Backup feature to back up your company's SQL server and Exchange Backup feature to back up the Exchange server. In addition, you can execute System Backup to back up the system and boot partitions on every computer and set a plan to execute the backup once a day or twice a week to ensure that the computer can be restored timely when it has boot issues. File Backup feature can be used to back up important user data. If there are a large quantity of computers, you can purchase EaseUS Backup Center to manage the backups on the client computers centrally.

About EaseUS Todo Backup

Be it a file, system, partition, or disk, EaseUS Todo Backup will help you back up or clone the item and provide you with multiple backup plans.