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 ...

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 ...

If you can’t delete a file or a folder on an NTFS file system volume on your Windows computer, you fall under one of the following cases. An Access Control List (ACL) is being used You can’t delete ...