If I may recommend knowing the Excel version, the operating system,
the storage medium (hard drive, OneDrive, Sharepoint, etc.),
explain your project / concern / problem step by step on the basis of this data / file
.. this is of great importance Advantage especially for you.
The helpers do not need any time to guess what it might be.
To be honest, this is usually the reason when no one replies to a message.
Here is some additional information on this topic:
Share your Excel workbook with others
About the shared workbook feature
Protection and security in Excel
How to allow certain users to edit cells range in Excel?
Hope I was able to help you with this info.
I know I don't know anything (Socrates)