Microsoft Excel has several features designed to help you recover unsaved versions of files and prevent data loss.

How to Recover a Microsoft Excel File That Is Not in a Recognizable Format. If Microsoft Excel fails to recognize a file in the XLSX or XLS format, the data contained in the file could be corrupted.

DataNumen is recognized as the best Excel repair and recovery tool globally. The tool can repair corrupt Excel xls and xlsx files to recover as much of the data as possible to minimize the loss ...