myProblem

    public void loadData()
    {
        if (File.Exists(Application.persistentDataPath + "/savedata"))
        {
            string jsonData = File.ReadAllText(Application.persistentDataPath + "/savedata");
            data = JsonConvert.DeserializeObject<DataHoard>(jsonData);
        } else if (File.Exists(Application.persistentDataPath + "/savedata.bkp"))
        {
            string jsonData = File.ReadAllText(Application.persistentDataPath + "/savedata.bkp");
            data = JsonConvert.DeserializeObject<DataHoard>(jsonData);
            File.Move(Application.persistentDataPath + "/savedata.bkp", Application.persistentDataPath + "/savedata");
        } else
        {
            data = new DataHoard();
        }
    }
    public bool saveData()
    {
        string jsonData = JsonConvert.SerializeObject(data);
        if (File.Exists(Application.persistentDataPath + "/savedata"))
        {
            if (File.Exists(Application.persistentDataPath + "/savedata.bkp"))
            {
                File.Delete(Application.persistentDataPath + "/savedata.bkp");
            }
            File.Move(Application.persistentDataPath + "/savedata", Application.persistentDataPath + "/savedata.bkp");
        }
        try
        {
            File.WriteAllText(Application.persistentDataPath + "/savedata", jsonData);
        }
        catch
        {
            if (File.Exists(Application.persistentDataPath + "/savedata") && File.Exists(Application.persistentDataPath + "/savedata.bkp"))
            {
                File.Delete(Application.persistentDataPath + "/savedata");
                File.Copy(Application.persistentDataPath + "/savedata.bkp", Application.persistentDataPath + "/savedata");
            } else if (!File.Exists(Application.persistentDataPath + "/savedata") && File.Exists(Application.persistentDataPath + "/savedata.bkp"))
            {
                File.Copy(Application.persistentDataPath + "/savedata.bkp", Application.persistentDataPath + "/savedata");
            }
            return false;
        }
        return true;
    }