By Andrew Armstrong 
Storage Sense is switched on for a lot of people and quietly achieving very little, because its defaults are extremely conservative. Configured properly it genuinely keeps a machine from filling up. Left alone it deletes the occasional temporary file and nothing else.
Quick Facts
- Default settings do almost nothing. Recycle Bin and Downloads cleanup are both off by default.
- It runs during low disk space by default. Change it to a schedule so it’s preventative.
- It can delete from Downloads. Understand this before enabling it; people keep things there.
- OneDrive dehydration is the big win. Files become online-only, freeing space while staying accessible.
- It never touches Documents, Desktop or Pictures.
Where to find it and what to change
Settings, System, Storage, Storage Sense. There are two layers: the toggle, and a configuration page behind it that most people never open.
| Setting | Default | Sensible value |
| Run Storage Sense | During low free disk space | Every week |
| Delete files in Recycle Bin | 30 days | 30 days |
| Delete files in Downloads | Never | 60 days, or Never if you hoard |
| Content becomes online-only | Never | 30 or 60 days |
Changing the run frequency from “during low free disk space” to “every week” is the single most useful change. Waiting until the disk is nearly full means you get a slow machine first and cleanup second.
The OneDrive setting is the one that matters
“Content becomes online-only” applies to OneDrive Files On-Demand. Files you haven’t opened for the chosen period lose their local copy but remain visible with a cloud icon, and download on demand when opened.
On a machine with a large synced OneDrive and a small SSD, this frees more space than everything else combined. The caveat is offline access: a file that’s online-only isn’t available on a train with no signal. If you travel, mark the folders you genuinely need as Always keep on this device.
What it will and won’t delete
- Will: temporary files, Recycle Bin contents older than the threshold, Downloads older than the threshold (if enabled), previous Windows installations, thumbnails and delivery optimisation cache.
- Won’t: anything in Documents, Desktop, Pictures, Music or Videos. Installed programs. Anything outside your profile.
The Downloads folder is the one to think about. Plenty of people treat it as a working directory rather than a transit area, and enabling deletion there will eventually remove something they wanted. Sixty days is a reasonable compromise; if you’re unsure, leave it at Never and rely on the other settings.
Running it now, and via PowerShell
There’s a Run Storage Sense now button at the bottom of the settings page. For scripted use, the underlying settings live in the registry per-user:
$key = 'HKCU:\Software\Microsoft\Windows\CurrentVersion\StorageSense\Parameters\StoragePolicy'
# Enable Storage Sense
Set-ItemProperty -Path $key -Name '01' -Value 1
# Run weekly (1 = daily, 7 = weekly, 30 = monthly, 0 = low disk space)
Set-ItemProperty -Path $key -Name '2048' -Value 7
# Recycle Bin cleanup after 30 days
Set-ItemProperty -Path $key -Name '08' -Value 1
Set-ItemProperty -Path $key -Name '256' -Value 30For an estate, don’t script the registry. Use the Group Policy settings under Computer Configuration, Administrative Templates, System, Storage Sense, or the equivalent Intune configuration profile. Both are cleaner and reportable.
When Storage Sense isn’t enough
Quick Steps
- Run Disk Cleanup as administrator for previous Windows installations and system files Storage Sense leaves alone.
- Check the component store:
DISM /Online /Cleanup-Image /AnalyzeComponentStore - Find the actual large files. Settings, Storage shows a breakdown, or use a disk analyser like DiskGeek.
- Check hibernation:
powercfg /hibernate offreclaims several gigabytes if you don’t use it. - Look at the page file if the drive is very small, though don’t disable it entirely.
Glossary
| Term | What it means |
| Storage Sense | Windows’ built-in automatic cleanup feature. |
| Files On-Demand | OneDrive feature keeping files visible but not stored locally until opened. |
| Dehydration | Removing a file’s local copy while keeping it listed and downloadable. |
| Delivery Optimisation cache | Update files cached for sharing with other machines on the network. |
| Component store | The WinSxS folder, often large, and not fully cleared by Storage Sense. |
Windows.old | Previous installation kept after a feature update, typically 10-20GB. |
Frequently asked questions
Does Storage Sense delete my personal files?
Only from Downloads, and only if you enable it. Documents, Desktop and Pictures are never touched. The Recycle Bin cleanup deletes things you’ve already deleted.
Why hasn’t Storage Sense freed any space?
Almost certainly because it’s set to run only during low disk space, and the Downloads and OneDrive options are off. Those defaults do very little.
Is it safe to enable the OneDrive online-only setting?
Yes, provided you have reliable connectivity when you need those files. Mark anything you need offline as Always keep on this device first.
Can I deploy Storage Sense settings across an estate?
Yes. Group Policy under System, Storage Sense, or an Intune configuration profile. Preferable to scripting the registry directly.
Storage Sense ran but the disk is still full. What now?
Run Disk Cleanup as administrator for previous installations, check the component store size with DISM, and use a disk analyser to find what’s actually taking the space. It’s often one folder nobody expected.
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