Android and XML (Reading/Wirting)

Hello everyone,

I have been trying to work with an XML file to store my data.

I was able to read and write data into my xml file when I test the program on my PC. But when I build the program for the android, only the reading works.

Here is how I do it. I attach my xml file to the variable TA in the Inspector

 public static XmlDocument XmlDoc;
 public static XmlNodeList xnl;
 public TextAsset TA;
 
 void Start()
 {    
     XmlDoc = new XmlDocument();
     XmlDoc.Load(new StringReader(TA.text));
     xnl = XmlDoc.GetElementsByTagName("level");
     DataFilePath = Application.dataPath + "/Data/Data.txt";
     // Play with the data / update some innertext ....
     XmlDoc.Save(DataFilePath);
 }

This works on my PC ... but not on my android ...

Is there is a better way?