@DhanasekarKD One of the following three suggestions might help you:
If it is a Word, Excel or PowerPoint file and you open the file, you should, in the top right corner, see who else has the file open.
Check the version history of the file and see who last saved it.
If you know the file name and if you are an Administrator, you could use the Audit Log and search for the file there and see who worked / works with it.