System files taking up too much spade on my hard drive

Question

Storage

Currently system files are taking up 55GB of space on my hard drive. Running Windows 365. Is this normal?

Answer 1

I assume you mean "Microsoft 365", not "Windows 365", which you wrote.

Windows 365 is a virtual PC in the cloud. It works with your OneDrive and can write to it. What you do in OneDrive on the cloud PC syncs to your local OneDrive folder.

Answer 2

Without knowing what's occupying that space, or what you consider system files, no one can say whether that's normal. It's certainly possible, depending on what you have installed and how you use your computer. Currently, my C:\Windows folder is 45GB. But that could be irrelevant since we may have very different apps and configurations.

Are you certain that you are running Windows 365? That's very different from desktop Windows.

Answer 3

Hi Margaret,

The system files can occupy 50+ GB of disk space on a Windows 11 system. The Windows directory contains system files, the component store (WinSxS folder), device drivers, and the driver store.

If you want to free up disk space in the OS volume, clean up the component store. To do so, run this from Command Prompt (admin).

DISM /Online /Cleanup-Image /StartComponentCleanup

Also, run Disk Cleanup (cleanmgr.exe) as administrator to remove temp files, superseded driver packages, temporary setup files, the delivery optimization cache, and other junk.

Please run the Disk Cleanup tool to reclaim disk space.

• Press Win + R, type cleanmgr.exe and click OK.
• Select the drive (C:), and click OK.
• Click the Cleanup system files button.
• Select the drive (C:), and click OK.
• Select all of the following checkboxes:

Microsoft Defender anti-virus
Windows upgrade log files
Temporary Internet files
System-created Windows Error Reporting files
DirectX Shader Cache
Delivery Optimization files
Device driver packages
Previous Windows installations
Recycle Bin
Temporary files
Temporary Windows installation files
Thumbnails

• Click OK.
• Click Delete Files.

Restart Windows.

Answer 4

Yes, that can be normal, especially if the device has:

• Windows update downloads and backup files
• system restore points
• temporary update files or cached system files
• hibernation or paging files
• logs and caches

Windows also needs disk space reserved for servicing updates, and system files can grow over time as updates are installed. The size can vary significantly depending on installed updates, optional features, RAM-related files such as Pagefile.sys and Hiberfil.sys, and restore point usage.

To check and reduce space safely:

1. Open Start > Settings > System > Storage.
2. Turn on Storage Sense.
3. Select Cleanup recommendations and review what can be removed.
4. Open Disk Cleanup, choose the system drive, and remove temporary files.
5. In Start > Settings > System > Storage > Temporary files, check whether Previous Windows Installation(s) is present before removing it.
6. Check Start > Settings > Apps > Optional features to see whether optional Windows features are installed that increase update space requirements.

Useful checks if the size recently increased:

• Settings > Windows Update > Update history to see whether a recent update was installed
• Create a restore point > select C: > Configure to review restore point disk usage

Storage Sense details that matter:

• It works on the system drive only, usually C:.
• By default, it cleans temporary files when the device is low on disk space.
• It does not manage Downloads or cloud content unless configured.

If the drive is very small, Windows itself, updates, restore points, logs, and RAM-related files can consume a large share of total storage.

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• Manage drive space with Storage Sense
• Free up space for Windows updates
• Compact OS, single-instancing, and image optimization
• Recent increases in System File storage - Microsoft Q&A