Delivery Optimization in Windows 10 clears its cache automatically. Files are removed from the cache after a short time period or when their contents take up too much disk space. However, If you need more disk space on your PC, you can clear the cache manually.

If you can't find some of your notes and worry that they might be lost, you can try to recover them. OneNote keeps a limited set of automatic backups by default. Where you look for them depends on where your notes are stored. Here's how to check.

On April 9, 2019, Microsoft identified a code issue that allowed locally stored OneNote notebooks to be imported and edited in OneNote for Windows 10 without connecting the notebook to the cloud. In this unsupported state, a user's changes to the notebook are stored only in the OneNote cache.

Use this app to try to recover lost files that have been deleted from your local storage device (including internal drives, external drives, and USB devices) and can’t be restored from the Recycle Bin. Recovery on cloud storage and network file shares is not supported.

When Office app closes unexpectedly before you save your most recent changes, Document Recovery automatically opens the next time you open the Office app to help you get your file back. Tip: If you are a Microsoft 365 subscriber the safest way to work is to store your files on OneDrive or SharePoint and use AutoSave. Windows macOS.

Find the Recycle Bin icon on the desktop. Right click (or press and hold) and select Empty Recycle Bin. Empty the Recycle Bin in Windows 10.

Learn how to delete and restore files in OneDrive. Recover deleted files or folders from the OneDrive recycle bin.

Learn how to run a disk cleanup in Windows including deleting temporary and system files to free up disk space.

If your notebooks are cloud-based (saved to OneDrive or to SharePoint Online), you can reclaim storage space on your computer or device without permanently deleting any of your notebook content. If you have run out of space on OneDrive or SharePoint, you’ll see an error about “Quota Exceeded.”

Find lost or missing files in OneDrive. If you've lost OneDrive files or folders, choose one of the options below, or use our guided troubleshooter to help you search for and restore your files. Start troubleshooter. Personal Work or School Android iOS.