Storage Sense in Windows 11 can clear temporary files and old Recycle Bin items from your C: drive on its own. Here is how to switch it on, set when it runs, and avoid the two settings that can remove or offload files you still want.
What Storage Sense deletes by default
Before you turn it on, know what you are agreeing to. According to Microsoft's Storage Sense support page (updated November 3, 2026), the default settings do this:
- Temporary files: cleaned up when the device is low on disk space.
- Recycle Bin: items are deleted after they have been there for some time.
- Downloads folder: not touched unless you set Storage Sense to do so.
- OneDrive and other cloud folders: not touched unless you set Storage Sense to do so.
So the defaults are cautious. The risk comes from changing the Downloads and cloud options without thinking about them.
Turn on Storage Sense in Windows 11
Microsoft's page gives these steps:
- Go to Start > Settings > System > Storage.
- Set Storage Sense to On.
That is enough to get the default behavior. To change what it does and when, keep going.
Choose when Storage Sense runs
- Go to Start > Settings > System > Storage.
- Select Storage Sense (the name, not just the toggle) to open its settings.
- Under Run Storage Sense, pick how often it runs. Microsoft says it runs on that schedule while you are online and signed in.
Microsoft's page does not list the options in that menu. Eleven Forum's guide lists them as Every day, Every week, Every month, and During low free disk space, with the last one as the default. That is an independent source, so check what your own PC shows.
What "low disk space" actually means
There is no fixed number. Microsoft says the threshold varies with disk size and minimum operational thresholds. You are in a low-disk state when the capacity bar in Settings > System > Storage turns red. If you leave the schedule on the low-space option, nothing happens until that bar goes red.
Keep it away from your Downloads folder
On the same Storage Sense settings page, you will see two cleanup controls:
- Delete files in my recycle bin if they have been there for over:
- Delete files in my Downloads folder if they haven't been opened for more than:
The first is fairly safe. The second is where people lose files. Many of us use Downloads as a long-term storage spot for installers, PDFs and receipts we rarely open but still need. "Haven't been opened" says nothing about whether a file matters.
The fix is simple: unless your Downloads folder holds nothing you would miss, don't change the Downloads setting. Since Microsoft says Storage Sense leaves Downloads alone unless you configure it to, the safest choice is to never set it. If you want the space back, move the files you need to Documents first, then clear Downloads by hand.
How the OneDrive online-only setting works
Cloud options appear only when you are signed in to a cloud account, per Microsoft's page. The control is labelled Content will become online-only if not opened for more than:.
Microsoft says that starting in Windows 11 version 22H2, the default for OneDrive files is online-only after 30 days unopened. As the label says, this makes content online-only rather than deleting it. The catch is that an online-only file needs an internet connection to open. If you work offline, on a plane or somewhere with patchy Wi-Fi, check this setting before you rely on local copies.
Why Storage Sense isn't cleaning your other drives
This is the most common "Storage Sense not working" complaint. Storage Sense works only on the system drive, usually C:, according to Microsoft. It will never clear space on a D: drive or an external disk, no matter how you set it.
To see and clean the other drives, Microsoft points to:
Start > Settings > System > Storage > Advanced storage settings > Storage used on other drives
For more ways to recover space on any drive, Microsoft has a separate guide on freeing up drive space in Windows.
Two more things that catch people out
Settings are per user. Microsoft says your Storage Sense settings apply only to you, and other users on the same PC manage their own. If a family member's account is the one filling the drive, they need to set it up while signed in as themselves.
Windows may switch it on for you. It notifies you, and you can turn it off right away. If you see Storage Sense already on and don't remember enabling it, this is the likely reason, and it is worth opening the settings to confirm the Downloads and cloud options are what you want.
