Yes, you can duplicate the original and do incremental refresh extract and publish to server.
what is the use of that. why you carry separate one here
It is because every month there will be new files to be located in the folder.
Then tableau server will need to do incremental refresh once the new file come in.
Date new files come in Files Name Incremental refresh 1-1-2018 Sales_Jan update all the rows from the file to tableau server 1-2-2018 Sales_Feb update all the rows from the file to tableau server
Can it be done?