[Explained] Windows Server 2012/2016/2008 C Drive Keeps Filling Up? How to Fix It

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"My company has a Server running a database on the E drive. The C drive is filling up at about 2 to 3 GB per day. I'm almost out of space, and I can't seem to find why it is filling up so much. The Windows folder is the only one I've seen go up at all since I've been monitoring it. Also the pagefile.sys is 9.5GB. Is this normal?"

As the upper case said, some users found that the C drive keeps filling up for an unknown reason, affecting PC boot speed, software loading, etc. Don't fret. It is easy to fix this annoying problem - Windows Server 2012/2016/2008 C drive filling up. We are here with you to find the culprit behind it and solutions.

Options to Fix Windows Server C Drive Filling Up - 4 Methods

Workable Solutions Step-by-step Troubleshooting
Fix 1. Clean Up System Disk By EaseUS Todo PCTrans Download EaseUS Todo PCTrans > Select "System Cleanup"...Full steps
Fix 2. Clean Up C Drive by Disk Cleanup Click on "This PC" > Right-click C drive...Full steps
Fix 3. Move Big Programs from C Drive to Other Drive Open EaseUS Todo PCTrans > Click "App Migration" feature from list...Full steps
Fix 4. Expand C Drive Space Check disk manager > Start to resize...Full steps

Why Does My Windows Server Drive Keep Filling Up?

No files add-in, but Windows Server C drive full. Or your C drive often has a “Low disk space” warning after adding a few data. Server C drive running out of space would be caused by System Restore Point, temp files, hidden files, etc. You can check how much your room has been taken by following steps. Then go to the methods part of cleaning up the C drive.

How to See Disk Usage in Windows Server:

  • Log in to Server Computer as the Administrator user.
  • Go to upper right side and select Tools > Computer Management > Storage > Disk Management.

4 Options to Fix Windows Server C Drive Filling Up

The last part talked about the reasons for the c drive entire issue. Here are some useful ways to clean C drive space in the following part. Some users may feel like "Use Disk Cleanup again; Delete Temp files comes." Don't worry. In addition to these common ways, we do explain another solution. Let's start!

1. Clean Up System Disk By EaseUS Todo PCTrans

Too many junk files would lower the running speed of the computer. A reliable drive cleaner can help you free up space in simple clicks. To quickly remove junk files, EaseUS Todo PCTrans is equipped with a "System Cleanup" feature to regularly clean up junk files (Such as system files, browser caches, app junk files......) and make your Server computer as a new one.

Start to get more space, download EaseUS Todo PCTrans:

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Your smart Windows Server file transfer software.

Unlimited file transfer between Servers.
Transfer programs, apps without reinstallation.
Transfer account, settings to new Server computer.
Data rescue, find product key for installed programs.

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An in-depth tutorial on the cleaning C drive:

Step 1. Open EaseUS Todo PCTrans on your computer. Click "System Cleanup" and click the "Scan" button to go on.

system cleanup - step 1

Step 2. When the scan completes, junk files will be listed. Selected the unwanted files. Be careful not to mistakenly delete files that affect the normal operation of your computer or software.

system cleanup - step 2

Step 3. Click the "Clean up" button and confirm the cleanup operation. You can regularly use this function to free up disk space.

system cleanup - step 3

2. Clean Up C Disk Space By Disk Cleanup

Accumulating junk files, unnecessary files 

Step 1. Click on This PC. Right-click C drive and choose Properties from the menu. 

fix c drive full - 1

You can see the "Disk Cleanup" on the window. Select it.

Step 2. Choose to clean temp files and Recycle Bin. Click OK.

fix c drive full - 2

Windows also performs a feature to remove temporary files and data in recycled Bin automatically.

Step 1. Open Settings > Go to Storage > View Storage Sense under Storage Management.

Step 2. Turn on the Storage Sense button.

Step 3. Configure cleanup schedules. 

3. Move Big Programs from C Drive to Other Drive

If Disk Cleanup is useless for you, you can try "App Migration" of EaseUS Todo PCTrans to change the location of installed programs. Since you are still running out of disk space after deleting the extra files, I suggest you look at whether the software installation is taking up too much disk space. With EaseUS Todo PCTrans, you are free to migrate two programs. More moving mission you need? Upgrade to see more choices.

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How to Move Files from C Drive to Other Drive:

Step 1. Run EaseUS Todo PCTrans on your PC

Go to "App Migration" and click "Start" to continue.

Select app migration transfer mode

Step 2. Select programs to move from C drive to another drive

1. Tick the C drive and select programs (marked as "Yes") that you want to transfer.

2. Click the triangle icon to select another drive on your computer as the destination, and click "Transfer" to start the process.

select programs to transfer

Step 3. Finish the transferring

Wait patiently until the transferring process finishes and click "OK" to confirm. 

finish transferring programs from C drive to another drive

When it has done, you can restart PC if necessary. This will keep all changes on your PC and then you can run and programs from another hard drive without reinstallation.

4. Expand C Drive Space

The last situation is that the Temp files are cleaned, and there are no extra big files on the C drive. But the drive still keeps filling up for no reason. The factor could be the limited C drive size. The server computer also need more free space for hibernation paging. You can increase C drive space by another third-party software - EaseUS Partition Master. It is stunning to manage drive space for better performance quickly.

Concluding Thoughts

Windows Server 2012/2016/2008 C drive filling up could be caused by many situations. So we sifted manual ways and two third-party tools. EaseUS Todo PCTrans is a good disk cleaner equipped with many practical functions. Besides cleaning up c drive space, this software also features to transfer files between two PCs

If the above methods can not solve your problem, please contact EaseUS via online chat. We are here for 24/7 Support.

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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[Explained] Windows Server 2012/2016/2008 C Drive Keeps Filling Up? How to Fix It

Try smart Windows 11 data transfer tool to move all data in 1 click.

EaseUS Todo PCTrans

  Free Download

100% Secure

  24/7 Tech Chat

Free Technical Support