Copy Your Excel File From Your External Storage to Your Local Storage # If your file doesn’t open after changing the extension, launch the app you created your file with and use the app’s Save As or similar option to change your file’s format to XLS or XLSX. If that isn’t the case with your file, change your file’s extension and see if that resolves the issue. Yours can also be a CSV file, which Excel supports opening. Most Excel spreadsheets use either the XLS or XLSX file format. Your current file may be in an incorrect file format, causing issues in the app. Your spreadsheet file must use an Excel-supported extension to launch the app.

Make Sure the File Has the Correct Extension # It’s worth using this option to resolve your issue. Microsoft Excel includes an option that allows you to fix your faulty files and then open them with the Excel app. Later, turning the feature back on if you want is easy. You can turn this option off to see if that fixes your problem. Uncheck Excel’s Dynamic Data Exchange (DDE) Option #Ī known cause of the above issue includes the enabled DDE feature in Excel.

If you don’t find Excel on the app list, select Choose another app, and you’ll see the app. You can fix that by forcing your system to launch your file with the real Excel app. If you have multiple spreadsheet programs installed on your computer, chances are you’re using a non-Excel app to launch your file. Make Sure You’re Using Excel to Open the File # While the main reason you can’t open your Excel file may be that your file is corrupt, there are other causes, like the wrong extension on your file, an unresponsive external device, a problematic Excel add-in, and more.

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