Topic: xlsx file unknown format

An XLSX file is a Microsoft Excel spreadsheet file used to organize and store information in rows and columns. Each box in the spreadsheet is called a cell, and each cell can contain text, numbers, dates, formulas, or formatted content. This makes XLSX files useful for many everyday and business tasks such as budgeting, scheduling, inventory tracking, reporting, accounting, and data analysis. Instead of being just a simple table, an XLSX file can hold multiple worksheets in one workbook, allowin...