A family of Microsoft products that enable users to capture, organize, and reuse notes electronically.
Hi,
Thank you for sharing your question. I understand how concerning it is when years of OneNote content do not restore correctly after moving from OneNote for Windows 10 to OneNote for Windows.
It’s especially stressful when sections appear only as “Open Sections” or in a read‑only state, and it feels like the backup hasn’t really restored your notebook.
This usually happens because OneNote for Windows 10 stores backups as individual .one section files, and when you open them directly, OneNote places them under Open Sections instead of restoring them into your notebook. Microsoft’s migration guidance explains that each .one file must be manually moved into an active notebook after opening, because they do not automatically rebuild the notebook structure.
To restore your notebook properly, open each .one section from your backup folder, then Move or Copy each section into the correct notebook. After moving the sections, they will sync normally in OneNote for Windows. If your original Windows 10 notebook shows as “Read‑Only,” that is expected behavior when opening standalone .one files OneNote requires importing them into a modern notebook to make them editable.
Can you confirm whether the .one files you opened are showing under Open Sections at the bottom of the notebook list, and whether your notebook was previously stored in OneDrive or only locally?
If you share what your folder structure and Open Sections look like, I can guide you step‑by‑step to fully rebuild your notebook and make sure none of your important content is lost.
I hope this helps.
Best Regards,
Noel