Unity 2018: Open an external process - unity3d

Question

I'm trying to start a process from unity. It should sync the streaming assets folder with a folder present in an http server.
Everything works well but it creates a streaming assets folder outside the "projectName_Data" folder.
I'm using this script:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class refreshVideo : MonoBehaviour {
public string processName;
public void startRefresh(string ipServer)
{
// Create a process
System.Diagnostics.Process process = new System.Diagnostics.Process();
// Set the StartInfo of process
process.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Normal;
process.StartInfo.FileName = Application.dataPath + "/" + processName;
process.StartInfo.Arguments = ipServer;
path = Application.dataPath;
// Start the process
process.Start();
process.WaitForExit();
}
}
The process is inside the dataPath and if I start it manually it sync the streaming assets folder without problems. If unity starts it, it seams to start it from outside the dataPath.
Can I tell to Unity to open the exteral exe from the dataPath folder?