KY
import org.apache.jmeter.services.FileServer;
import java.io.File;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
String newfile_path = FileServer.getFileServer().getBaseDir()+File.separator+'dataEDPS'+File.separator+'some.csv'
File file = new File(newfile_path);
file.text= "some_text"