Excel cannot be open the file 'filename.x…
https://techcommunity.microsoft.com/t5/excel/excel-cannot-be-open-the-file-filename-xlsx-because-the-file/td-p/1504346
Excel cannot be open the file 'filename.xlsx' because the file format or file extension is not valid. 1 Right-click the Excel file that cannot be opened and select Properties. 2 After the file’s Properties dialog opens, select the Security tab, and then click the Edit button. 3 After the file’s Permissions dialog opens, click the Add button. 4 When the Select Users or Groups dialog opens, click the Advanced button. When the... Check the file extension. If it is unsupported, change it to another file format that Microsoft Excel supports. Repair the file. The spreadsheet may be corrupt. Change group permissions. Add the Everyone group to the group or user list and give it full control. Solution 1. Check the File Extension If you’re unable to open the file, it could be due to an unsupported file extension. ... Open the Microsoft Excel file and navigate to the File tab. Click the ‘Export’ button and select ‘Change File Type’.
Check the file extension. If it is unsupported, change it to another file format that Microsoft Excel supports.
Repair the file. The spreadsheet may be corrupt.
Change group permissions. Add the Everyone group to the group or user list and give it full control.
Solution 1. Check the File Extension If you’re unable to open the file, it could be due to an unsupported file extension. ...
Open the Microsoft Excel file and navigate to the File tab.
Click the ‘Export’ button and select ‘Change File Type’.
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