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[Fixed] Hard Drive or C Drive Full for No Reason in Windows 10/8/7

Updated by Roxanne on Sep 24, 2021
Written by Jean
mins read

Is your hard drive full for no reason? Is C drive showing full but no files are there? Here are 8 solutions for you to solve the problem of a Windows 10/8/7 disk full but nothing on it. You can try them one by one to solve your problem perfectly.

Workable Solutions Step-by-step Troubleshooting
Fix 1. Verify the virus You should suspect a virus or some malicious software you unknowingly installed...Full steps
Fix 2. Empty Recycle Bin Recycle Bin is part of the hard drive and keeps all the temporary deleted files. The more disk space...Full steps
Fix 3. Check and repair disk errors If your hard disk has errors with a corrupted file system, you will see the hard drive full without reason...Full steps
Fix 4. Show hidden files & folders When there are a lot of hidden files or folders on your hard drive, you will find hard drive full but no files...Full steps
Other useful fixes Clean up junk files, delete temporary files, increase C drive space, and upgrade to a larger HDD/SSD...Full steps

Why Is My Hard Drive Full   

Many users have confronted hard drive full for no reason or C drive full for no reason issue on Windows 10. When the hard drive is full, your computer may run slowly, and you can't store new files or data.

In this case, you might want to know: Why is my hard drive or C drive full without reason? The possible causes can be:

  • Too many applications or files saved on the disk.
  • There is not enough disk space.
  • File system corruption on the hard drive.
  • Much temporary and cached files.
  • Virus or malware attack.

So how to resolve hard drive full for no reason problem on Windows 10 or Windows 7? Let's troubleshoot with the effective solutions in this tutorial.

8 Fixes for a Hard Drive Full But No Files Windows 10/8/7

The below part consists of all possible solutions to C drive full for no reason. They also can be applied to some relevant searches, for example, "hard disk full but no files", "external hard drive full for no reason" and "C drive showing full but nothing on the computer". 

Fix 1. Verify the virus problem

The current used space is not in compliance with the actual size of existing files and folders, considering that something is stealing the disk space. First of all, you should suspect a virus or some malicious software you unknowingly installed from an email link or somewhere else. Run the anti-virus software on your computer, and start a thorough disk scan for all the suspicious programs. Once found any, uninstall and remove them all clean. For those who don't have a virus protection program, Kaspersky and Malwarebytes are reliable and helpful.

If you prefer using CMD to remove a virus from a hard drive or external storage drive, visit the linked page for a tutorial.

Fix 2. Empty Windows recycle bin

Don't neglect the recycle bin, which holds quite a lot of abandoned files. A crowded recycle bin is accused of taking up some disk space until you empty it.

Step 1. Locate the recycle bin icon, right-click on it and choose "Open".

Step 2. Press Ctrl + F1 to expand the ribbon of Recycle Bin Tools, and choose the first option, "Empty Recycle Bin".

empty recycle bin to fix hard drive full problem

In my case, I cleared the recycle bin and spared about 13GB of disk space.

empty recycle bin to free up disk space

Fix 3. Check and repair disk errors

When the hard drive's file system gets corrupted, it will show the capacity incorrectly and cause the C drive is full for no reason problem. You can use a hard drive repair tool - EaseUS Partition Master to check and repair back sectors by fixing the file system errors with the Check File System feature.

Free Download 

Windows 11/10/8/7100% Secure

Now, download this partition management software to check and repair a corrupted file system and fix the hard disk full but no files issue on Windows 10.

Fix 4. Show hidden files & folders

For the case the hard drive showing full but no files were seen, you can try to unhide files and folders to determine whether hidden items occupy the disk space.

How to show hidden files/folders in Windows 10/8/7:

Step 1. Open "Control Panel" > "File Explorer Options" > Click "View" tab > Check the box in front of "Show hidden files, folders and drives".

Step 2. Return to the problematic drive and check how much the hidden items eat up disk space. If it's necessary, delete the bloated ones.

show hidden files and folders in windows 10, 8 and 7

Fix 5. Safely clean up junk files and large files

In the process of using the system or software, there will be a lot of garbage files. You can use a free PC cleanup tool to safely clean out your junk files on the C drive and improve the computer performance.

The following steps will show you how to clean up system junk files on your hard drive.

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Windows 11/10/8/7100% Secure

Step 1. Download and install EaseUS Partition Master Suite on your PC. Click to download PC Cleaner on panel.

clean up system step 1

Step 2. Install EaseUS CleanGenius on your PC. To begin with, navigate to "Cleanup" and click "Scan."

clean up system step 1

Step 3. EaseUS CleanGenius will start immediately to scan all the useless files, select system junk files and invalid entries, and click "Clean" over all your PC.

clean up system step 2

Step 4. Once completed, you can see clearly how many MBs or GBs of data are cleaned. Click "Done" to finish the process.

clean up system step 3

Fix 6. Delete temporary files

My C drive is full without reason. Are you one of the members going through the low disk space warning on a system drive? Then it's time to raise attention to the temporary files, which usually refer to leftover files, such as Windows installation files, upgrade logs, browse caches, etc. Follow the steps below to clear temporary files to solve the hard drive full without reason issue. 

Step 1. Go on typing %temp% in the Run box and hit Enter.

Step 2. Press Ctrl + A to select all and press Delete. Skip the one that is currently using.

delete temp folder

Fix 7. Extend C drive

If you encounter the C drive running out of disk space issue and shows full for no reason, you can try to use EaseUS Partition Master to help you easily increase C drive on Windows 10 for free. 

Free Download 

Windows 11/10/8/7100% Secure

Option 1. Extend System C drive with unallocated space

  1. 1. Right-click on the System C: drive and select "Resize/Move".
  2. 2. Drag the system partition end into the unallocated space so to add it to the C: drive. And click "OK". 
  3. 3. Click "Execute Operation" and "Apply" to execute the operations and extend the C drive.

Option 2. Extend System C drive without unallocated space

  1. 1. Right-click a big partition with enough free space on the system disk, select "Allocate Space".
  2. 2. Select the system drive at the Allocate Space From (*) To section, and drag the end of System C drive into the unallocated space. Click "OK" to confirm.
  3. 3. Click "Execute Operation", it will list the pending operations, and click "Apply" to save the changes and extend the C drive.

0:00-0:32 Extend System Drive with Unallocated Space; 0:32-1:00 Extend System Drive without Unallocated Space.

Fix 8. Upgrade hard drive to a larger HDD or SSD 

If nothing helps in the end, and your hard drive is really small, it's time for you to consider a hard drive replacement. It can be simple to swap a small hard drive to a larger one as long as you find the right method.

EaseUS Partition Master, as a versatile disk & partition management software, can help you repair hard disk and let you seamlessly upgrade hard drive to HDD or SSD with the disk/partition clone function. With this partition manager, you can upgrade system hard disk to a bigger one or migrate Windows 10 to SSD/HHD without reinstalling


We presented Windows users with 8 useful methods to fix hard drive full for no reason problem in a nutshell. We hope you've seen a satisfying result after going through this page. Except there is a real hard disk problem that is draining the disk space abnormally, you should have requested the free space back, for a little or plenty.

Bonus Tips: How to Fix Hard Drive Full for No Reason on Mac

Just like Windows users, Mac users also meet the hard disk full issue. How to free up storage space on your Mac? Here are some useful tips:

  • Store all files, photos, and messages in iCloud instead of the local disk 
  • Use the Optimize Storage feature to save space automatically removing unwanted files 
  • Empty Trash and remove unneeded files
  • Use the Reduce Clutter option to find and delete large files you no longer need 
  • Move files to an external storage device
  • Manually delete application/browser caches and system junk
  • Remove iOS devices' backups 
  • Delete language packs
  • ...

How Can We Help You

About the Author

Updated by Roxanne

Roxanne is one of the main contributors to EaseUS and has created multiple posts on digital devices like PCs, Mobile phones, tablets, Mac, etc. She loves to share ideas with people of the same interest.

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Written by Jean

Author Jean has been writing tech articles since she was graduated from university. She has been part of the EaseUS team for over 5 years. Her special focuses are data recovery, disk partitioning, data space optimization, data backup and Mac OS. By the way, she's an aviation fan!

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Product Reviews

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  • I love that the changes you make with EaseUS Partition Master Free aren't immediately applied to the disks. It makes it way easier to play out what will happen after you've made all the changes. I also think the overall look and feel of EaseUS Partition Master Free makes whatever you're doing with your computer's partitions easy.

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  • Partition Master Free can Resize, Move, Merge, Migrate, and Copy disks or partitions; convert to local, change label, defragment, check and explore partition; and much more. A premium upgrade adds free tech support and the ability to resize dynamic volumes.

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  • It won't hot image your drives or align them, but since it's coupled with a partition manager, it allows you do perform many tasks at once, instead of just cloning drives. You can move partitions around, resize them, defragment, and more, along with the other tools you'd expect from a cloning tool.

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