Forum Discussion
Excel cannot be open the file 'filename.xlsx' because the file format or file extension is not valid
It was probably not saved as an Excel file.
Before repairing, please change all Excel files to All files (*. *) .
If this is not the case either, it is very likely that it will no longer be possible to restore the file.
Additional Info:
Repairing a corrupted workbook
Thank you for your understanding and patience
Nikolino
I know I don't know anything (Socrates)
In my case, the same problem occured after I moved my One Drive folder to another disk, because the original location had no more space.
After moving, the files in the new place became outdated, probably because local files were not synchronized with the cloud.
I deleted the original One Drive folder, and the system asked for a complete deletion, because the folder was too big.
After knowing that some of my spreadsheets were outdate, I recovered them using third party software, but Excel doesn't open them, the message is the same in this post.
I've tried all solutions posted here, and also all solutions proposed by Microsoft, but I had no success. It's frustrating because I can see that the size of the recovered file is a little bigger than the outdated file, what is coherent. Also, the same problem occurs with all spreadsheets restored. I still think that this thing is related to One Drive.
Finally, I tried to attach one of the files and received the error message:
- The attachment's caixa 2021.xlsx content type (application/vnd.openxmlformats-officedocument.spreadsheetml.sheet) does not match its file extension and has been removed.
With your permission, please open a new post when you like to make a new ask.
In this way, the different problems and solution approaches can be more easily understood for all members in the forum.
For those who have received a proposed solution in this post and thus solved their problem, I would like to ask you to mark the proposed solution as a correct answer and / or as a like (thumbs up), so that other members can also be better helped in the future.
That is the least that a person seeking help can do to pass on help.
At the same time, if I may recommend, always include a file (without sensitive data) in your request as far as possible. Describe your request as detailed as possible based on this file.
This is how you can help yourself and everyone who wants to help.
Thank you for your patience and understanding,
Nikolino
I know I don't know anything (Socrates)
- Where can I find this info because what Glaydson happened to me and I want to fix this.
