im trying to get the file on StreamingAssets folder i created on Assets using UnityWebRequest but it is not work can someone help me?

im trying to get the file on StreamingAssets folder i created on Assets using UnityWebRequest but it is not work when i start build and run my project on android in unity

IEnumerator CheckDB()  // updating database
{
    if(!File.Exists(dataFilePath))
    {
        
        #if UNITY_ANDROID 
        // getting the source file, for android 
        string  path = "jar:file://" + Application.dataPath + "!/assets/game.dat";
        // object downloader
        UnityWebRequest downloader = UnityWebRequest.Get(path);
        while (!downloader.isDone)
        {
            // nothing to be done while downloader gets our db file
        }

        // then save to application.persistentdatapath
        yield return downloader.SendWebRequest();
        RefreshData();
        #endif
    }
}