Forum Discussion
Excel cannot open the file 'Vocabulaire.xlsx' because the file format or file extension is not valid
I tried many online tools I tried solutions like zipping, etc. I tried solutions like changing the extensions I tried converting to other formats I didn't try the permission solution as I'm on m...
Then why does the file size seem normal?
Apparently because the existing contents have not been removed, but overwritten by bytes with value 0.
