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Storage Running Out of Space on Windows 10
My Windows 10 system drive is almost completely full, showing less than 5 GB of free space out of 256 GB, even though I have already emptied the Recycle Bin and uninstalled a few large programs. I have run Disk Cleanup and disabled hibernation, but the storage keeps filling up on its own, and I suspect there might be hidden temp files, old Windows update backups, or a memory dump taking up room. Could someone guide me through advanced methods to safely reclaim space, identify the main culprits, and prevent this from happening again?
3 Replies
With less than 5 GB free, move large personal files off C: first so Windows has room to work. Then open Settings > System > Storage > Temporary files and review the categories before removing anything. Also run Disk Cleanup as administrator, choose Clean up system files, and look for Windows Update Cleanup, System error memory dump files, and Previous Windows installation(s). Only remove the previous installation if there is no need to roll back Windows.
To find what is actually growing, scan C: with a disk-usage tool such as TreeSize Free or WinDirStat. Use it to identify large folders, not to delete items inside Windows folders by hand. Check System Volume Information through Create a restore point > Configure, since restore points can occupy many gigabytes. If no recent crash is being investigated, memory-dump files can be removed through Disk Cleanup.
An Administrator Command Prompt can also run this safe cleanup:
DISM /Online /Cleanup-Image /StartComponentCleanup
Do not manually delete WinSxS, SoftwareDistribution, the page file, or other Windows folders. After cleanup, keep roughly 15-20 GB free if possible. If space begins disappearing again, compare a new disk-usage scan with the first one to identify the folder that is growing.
Open File Explorer, right-click your C: drive, and select Properties.
Please ensure you've Storage Sense feature enabled.
Go to Settings > System > Storage > Change how we free up space automatically > Free up space now > Clean now.
You may refer detailed steps in this guide:
https://www.kapilarya.com/how-to-use-storage-sense-to-automatically-free-up-space-in-windows-10
Additionally, check if you've Windows.old folder at C: drive root in File Explorer. It may take up additional GBs of space which you can reclaim by deleting the folder.
Let us know if this helps!
Note: Included link in this reply refers to blog post by a trusted Microsoft MVP.
