A Microsoft file hosting and synchronization service.
I often do work on files (Word and Excel) while not connected for the internet, sometimes for a couple weeks while traveling. Then when I do have internet, OneDrive keeps replacing the updated files with older versions it has stored. I lose weeks worth of work. It is so frustrating. How do I recover the lost work? Why does OneDrive replace newer, updated versions with the old ones?
Second, when I disconnect OneDrive, although I have it set to keep all files on my laptop, I no longer have the folders or files on the laptop. I go to Windows Explorer and Documents and Pictures folders are gone. Also, I go to This PC>Window>Users and there are no folders, no files.
Check OneDrive -> Settings -> Sync and backup -> Advanced Settings -> Files On Demand.
It seems that if this setting is Off for Device A but On for Device B it will assume that Device A must automatically have the latest versions and no further checking of dates and versions is carried out. If that is actually what happens then there is a simple but potentially devastating logic error in the OneDrive code which should be fixed urgently.