Forum Discussion
Excel cannot be open the file 'filename.xlsx' because the file format or file extension is not valid
Hi All, I have a excel.xlsx file saved in my system which has been corrupted .I atleast need to recover the data stores .It is a file of 124 KB and has around 35 worksheets in the workbook .I hav...
I got this error, and the file size was reduced from 1645 kb to 7 kb. The content was deleted. Log in to OneDrive and open the version history of the file. Restore the previous version and download the file to your computer.