This post only provides one of the possibilities to resolve the error “”Execution Timeout Expired. The timeout period elapsed prior to completion of the operation or the server is not responding.” in SQL Server.
When I use C# to backup my database then I hit the error above.
Use the database you are having the error, or select the database you are having the error from SQL Server management studio.
Run the below SQL Statement.
If this is not working then try. It works for me without the following statement.