void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);

  String AllPath = "/Root/111/222/333/444";
  String NewPath;
  String NewDir;

  NewPath = AllPath;
  NewDir = AllPath;

  String TAG = "/";

  int Pos1 = NewPath.lastIndexOf(TAG);
	int Pos2 = NewPath.length();
  NewPath.remove(Pos1, Pos2 - Pos1);
  NewDir.remove(0, Pos1 + 1);

  Serial.println("AllPath: " + AllPath);
  Serial.println("NewPath: " + NewPath);
  Serial.println("NewDir: " + NewDir) ;
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}