Hi @Karen Lim
If you try to open the "excel corrupted files", what error message will you get?
Here are 2 articles about repairing corrupt worksheets.
Repairing a corrupted workbook
Please note, you need to back up your files first, then you can try the steps in these articles, such as trying "Open and Repair" feature.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.