The cause appears to be the use of non-ASCII characters in file names. Microsoft describes it like so: “Any user may be unable to open Excel files attached to email messages in the new Outlook client ...

You’ve spent hours working on an Excel workbook on a MacBook, but now it’s gone. Or, when you exit an Excel file, you unintentionally select “Don’t Save”. Is this to say that your entire effort has ...

If you often use a computer for work, you've probably encountered some .csv files as part of your daily grind. On the surface, they may seem like a strange alternative to the far more well-known .xlsx ...