If you're unable to uncheck Read Only in the Folder and files on Windows 11/10, use attrib command. More solutions have been ...
OneDrive users may experience issues while opening a file in the ‘Available when online’ status. At such times, you may see an error message box – Can’t open ...
Oh, and yeah, you can't 'open' multiple types of files at once since they would not all 'open' in the same software. I suppose you could make a feature request to Microsoft to add that capability, it ...