A Microsoft file hosting and synchronization service.
If you're using OneDrive for Education (work or school account) and the storage shows as full even though you cannot find any large files on your device, the storage consumption may be coming from items that are stored online rather than locally. You can refer to the AI recommendations first, then you can try the following checks if it still persist:
Review storage usage online
Sign in to OneDrive on the web > Select Settings > OneDrive settings > More settings > Storage Metrics. This view shows the largest folders and files in your OneDrive and is often more accurate than checking the local synced folders.
Check the OneDrive Recycle Bin
Deleted files in OneDrive continue to consume storage until they are permanently removed from the Recycle Bin. On the OneDrive web portal, look for Recycle Bin in the left navigation pane > Empty both the Recycle Bin and, if available, the Second-stage Recycle Bin.
Check file version history
File versions can consume significant storage even when the current file appears small. Storage usage may be higher than expected due to version history > Review large files and reduce unnecessary versions where permitted.
If it still persist, for education tenants, you can try to contact your IT administrator to inspect the user's OneDrive storage usage from SharePoint/OneDrive administration tools. In some cases, hidden content such as retention-related libraries or compliance holds can consume storage and cannot be removed by the end user.
I hope this information helps and look forward to your update.
If the answer is helpful, please click "Yes". If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in the forum documentation to enable e-mail notifications if you want to receive the related email notification for this thread.