I understand that you have experienced a loss of files and folders in OneDrive after reinstalling Windows 11 and configuring OneDrive. I'm sorry to hear about your situation. Losing important files can be frustrating.
First, let's try to troubleshoot the issue. Please make sure that you have signed in to OneDrive using the same Microsoft account that you used before the reinstallation of Windows 11. Also, ensure that you have checked the recycle bin on both your local machine and OneDrive. Sometimes, the deleted files may still be recoverable from the recycle bin.
If the files are not present in the recycle bin, they might have been permanently deleted. In that case, you can try using data recovery software, such as Recuva or EaseUS Data Recovery Wizard, to attempt to recover the lost files from your hard drive. However, please note that the success of file recovery depends on various factors, such as the duration since the files were deleted and the extent of disk usage since then.
Regarding the disappearance of your user libraries, it's possible that the reinstallation of Windows 11 caused a change in the default library locations. By default, the libraries (such as 'Documents', 'Photos', and 'Downloads') are located in the user profile folder on the system drive (usually C:\Users\<YourUserName>). If this location has changed, it may explain why the libraries are no longer accessible.
To check and configure the library locations in Windows 11, you can try the following steps:
1. Open File Explorer by pressing Win + E on your keyboard.
2. Right-click on the "Libraries" item in the navigation pane on the left.
3. Select "Properties" from the context menu.
4. In the "Libraries Properties" window, ensure that the library names and locations are correctly set. You can click on each library, such as "Documents" or "Photos," and then click on "Set save location" to specify the correct folder location.
If the library locations are incorrect or not set, you can adjust them accordingly. Once you have set the correct locations, your libraries should be accessible again.
In the future, to avoid data loss, it's always a good practice to have regular backups of your important files, either using cloud storage services like OneDrive or external storage devices.
I hope this information helps you recover your lost files and resolve the issue with your user libraries. If you have any further questions or need assistance with any specific steps, please feel free to ask.