Формат файла XLSX — что такое файл XLSX?
Xlsx File Format Is Not Valid. Web excel cannot open the file 'fonts and paper.xlsx' because the file format or file extension is not valid.
Web excel cannot open the file 'fonts and paper.xlsx' because the file format or file extension is not valid.
Web excel cannot open the file 'fonts and paper.xlsx' because the file format or file extension is not valid. Web excel cannot open the file 'fonts and paper.xlsx' because the file format or file extension is not valid.
