void WriteBuffered(char * ftpfile) {
  
  file.open(ftpfile, O_RDONLY);  
  uint32_t dataLength = file.fileSize();
  Serial.println (dataLength);
 
  uint32_t m;
  size_t n;
  while((m = file.read(clientBuf, bufferSize))>0) {
    n = dclient.write(clientBuf, m);
    while (n != m) {
      delay(100);
      n = dclient.write(clientBuf, m);
    }
  }
}