What's your Windows version please?
I think it is your Office version. :) I mean OS version, something like Windows 10, 8, 7 etc.
Okay. Thanks for the info. Please do the following steps:
1. Right-click the Windows button at the lower-left corner of your desktop screen.
2. Choose File Explorer from the long list popped out.
3. At the "Search Quick Access" at the upper-right corner of the File Explorer window, type in "*.one", then all your OneNote files should be listed.
4. Click the View menu and choose Details to show all details of the listed file.
5. Click Data Modified file to sort the files by date
6. Check if the missing file is in the list.
Please check my screenshot blow and the given steps in numbers.
I guess you missed "*.".
I am asking you to type *.one (star dot o n e), not just one.
Oh, it seems you don't have any local OenNote files. Do you always save and sync OneNote files on OneDrive or something like that such as Dropbox?
If you do have heaps of files saved on OneDrive, I would recommend you to logon OneDrive via web and search all OneNote files using it web interface, to make sure you haven't miss it somwhere on OneDrive.
To do that, log on from here, then search everything as shown in the screenshot below.
Sorry for the typo: to make sure you haven't missed it somewhere on OneDrive.
Interesting. Did you work on the two OneNote files at the same time (two files opened at the same time on the same machine) so you might mixed them when doing copy and paste?
You have a SharePoint server?
BTW, if you are using OneDrive for Business and have enabled File History, you may retrieve the earlier versions of your work document. Please check this Microsoft article.
> the box is checked saying the notebooks are backed up on Sharepoint
Please share a screenshot of it and let me determine the details. Thanks.
OK, if so please share a screenshot telling details about what you saw about SharePoint.
Found from where? Your backup folder?
That's just something when I saw your screenshot.
If you are not using a SharePoint server, that SharePoint option is not applicable for your though it is checked.
The backup folder is somewhere to be checked as it is your local backup folder for OneDrive.
You may adjust the time interval from one week to one day to keep more up to date copies.
You are welcome.
As you have found your file, may I ask you to kindly accept my answer and rate my service to close the question? Thanks.
Are you still with me?