Windows Server 2012 low disk space issue

Updated on: June 5, 2019

This article shows how to remove Windows Server 2012 low disk space alert/warning/notification and how to fix low disk space issue on Server 2012 (R2) completely.

Why C drive running low on disk space

The partition volumes are allocated while installing Operating System, the more files you save to a partition, of course fewer disk space left. Comparing with data volumes, system C drive is more likely running low on disk space, because many types of files are saved or generated in it continuously.

Windows Updates, programs and relative output files eat up free disk space very quickly. Many server administrator encountered the low disk space issue. It is annoying, because Windows may pop up the notification again and again.

How, following the right step, Windows Server 2012 low disk space issue can be fixed fast and easily.

About Low Disk Space alert/warning

It is very dangerous if the system C drive is getting full, in that case server may stuck, reboot unexpectedly or even crash. To avoid future damage, Microsoft provides "Low Disk Space" notification to alert people when a drive is running out of space. When you see such low disk space balloon warning on bottom right task bar, you'd better begin doing something as fast as possible.

However, some people feedback that Windows Server 2012 pops up wrong low disk space alert. If you are sure about this, you may search by Google about how to disable this warning notification.

In most cases, the system C drive is running low on space indeed. You may open File Explorer or Disk Management to check the remaining free space. C drive (and other) will changed to be red in File Explorer when few free space left.

How to fix Server 2012 low disk space issue

To completely solve this problem, there are 2 necessary and 1 optional step. I'll explain the reason and show you detailed operations.

Steps to fix Low Disk Space on Windows Server 2012 (R2):

Step 1: Clean up to reclaim disk space

The same with other version, Windows Server 2012 has built-in Disk Cleanup utility to help remove junk files, the you can reclaim free disk space. This utility is easy, fast and also able to delete most common junk files safely. To the servers that never or have not free up disk space for a long time, Disk Cleanup may helps regain over 10GB disk space.

  1. Press Windows and R on your keyboard, type cleanmgr and press Enter.
  2. Select C: (or other) drive in the drop-down list and click OK.
  3. Click the check-box in front of the files that you want to delete and then click OK to execute.

If you receive error with message Windows cannot find 'cleanmgr', you need to install or enable Disk Cleanup on Server 2012 first.

Select files

Step 2: Expand C drive larger

Even if you can reclaim more than 10GB free space, it will be eaten up in a short time by new generated junk files. This is the reason why many people complain that Windows 2012 low disk space issue is annoying. You'd better expand C drive to larger size, especially to the server that C drive is created small.

With some server partition software, you can get free unused space from other partitions and transfer into C drive. No other operations are needed even if you use any types of hardware RAID arrays. Operating System, programs and associated settings, as well as anything else keep the same with before.

Download NIUBI Partition Editor and follow the steps to extend C drive on Windows Server 2012:

Video guide

As the safest tool, NIUBI Partition Editor provides unique 1 Second Rollback, Virtual Mode and Cancel-at-will technologies to ensure system and data intact.

Step 3: Monthly maintenance

As I said above several times, new junk files will be generated, so you'd better run Windows Disk Cleanup every month.

In addition, if you installed programs with default settings, you'd better change the output path to other large partitions.

When you have a larger C drive and clean it up more frequently, there's less probability to encounter C drive low disk space issue on Windows Server 2012 (R2).