How to Fix OneDrive Taking Up Too Much Disk Space

What Causes This?

OneDrive can use a lot of disk space when it keeps full local copies of files that are also stored in the cloud. This usually happens when folders are marked to stay available offline, when Files On-Demand is turned off, or when large Desktop, Documents, and Pictures folders are being backed up automatically. Cached sync data, duplicate local copies, and old files that were never switched back to online-only can also slowly fill your drive.

Common Symptoms

• Your C: drive keeps losing free space even though most files are in OneDrive
• File Explorer shows large OneDrive folders stored locally
• Windows warns that your PC is low on storage
• OneDrive folders have green check marks on many files and folders
• Storage settings shows unexpected usage under Documents, Pictures, or Other

How to Fix It Manually

1. Check how much space OneDrive is using

   • Open File Explorer with Win + E.
   • Select your OneDrive folder in the left sidebar.
   • Right-click large folders like Documents, Pictures, or Desktop, then click Properties.
   • Look at Size on disk. If it is very large, those files are stored locally.

2. Turn on Files On-Demand

   • Click the OneDrive cloud icon in the taskbar notification area.
   • Click the gear icon > Settings.
   • In the Sync and backup or Settings tab, make sure Files On-Demand is enabled.
   • This allows files to stay in OneDrive without keeping a full local copy on your PC.

3. Free up space from files already downloaded

   • Open your OneDrive folder in File Explorer.
   • Right-click folders or files you do not need stored locally.
   • Click Free up space.
   • Windows will keep the files in OneDrive, but remove the local copy.
   • Avoid choosing Always keep on this device unless you need offline access.

4. Review folder backup settings

   • Click the OneDrive icon > gear icon > Settings.
   • Open Sync and backup > Manage backup.
   • Check whether Desktop, Documents, and Pictures are being backed up.
   • If one of these folders contains large files you do not want synced, stop backing up that folder or move the large files elsewhere.

5. Find large files in OneDrive

   • Open Settings with Win + I.
   • Go to System > Storage > Show more categories > Other or Documents.
   • You can also use File Explorer search in your OneDrive folder and sort by Size.
   • Delete files you no longer need, or move them out of synced folders if they should not be stored in OneDrive.

6. Reset OneDrive if storage use seems wrong

   • Press Win + R to open Run.
   • Enter: onedrive.exe /reset
   • Press Enter.
   • If OneDrive does not restart automatically after a minute or two, open Start, search for OneDrive, and launch it again.
   • This can clear sync issues that leave extra local data behind.

7. Empty the Recycle Bin

   • Double-click Recycle Bin on your desktop.
   • Click Empty Recycle Bin.
   • Deleted OneDrive files can still take up local disk space until the bin is cleared.

Fix It Automatically with Kudu

Kudu can scan your PC for storage waste caused by OneDrive, including files pinned for offline use, oversized synced folders, and other space-hogging settings. Instead of digging through OneDrive and Windows menus yourself, Kudu helps you spot what is safe to clean up and reclaim space faster.

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