Excel file types CSV vs XLSX vs XLSM

0:38   How To Change Excel File Extension xls, xlsx, xlsm, xlsb, xps, pdf 6:46   Understanding File Types (.xls, .xlsx, .xlsm, .csv, .txt) in Microsoft Excel 1:14   How To Change Excel File Extension xls, xlsx, xlsm, xlsb, xps, pdf 0:52   How To Change Excel File Extension xls, xlsx, xlsm, xlsb, xps, pdf - 2026✅ 1:57   What is difference between xls and xlsx files of Excel?? 2:29   How do i fix file format or file extension is not valid in excel 7:38   Open A Password Protect Excel File with 3 Methods (No Software & 100% Free) 1:08   How to find all the excel files on your windows computer 7:58   Microsoft Excel - File Formats: Differences, Pros, and Cons 1:40   How to Change the Format on a Excel Document From XLSX to XLS 5:23   1-7: Understand Common Excel file formats (XLSX, XLSM, XLSB, XLS, PDF) 2:47   Why Excel File Types Matter: A Quick Guide 1:40   Excel cannot open the file '.xlsx' because the file format or file extension is not valid - ⚠️SOLVED