Simple abstract ScriptableObject Class to break settings assets into json file

ExternalScriptableObject.cs

using System.IO;
using UnityEngine;

public abstract class ExternalScriptableObject : ScriptableObject 
{
    void OnEnable()
    {
      string filePath = Path.Combine(Application.dataPath, GetFileName());
      if( File.Exists(filePath) ){
          JsonUtility.FromJsonOverwrite( File.ReadAllText(filePath), this );
      } 
    }

    public string GetFileName(){
      return name+".json";
    }
}

ExternalScriptableObjectPostprocessBuild.cs

using UnityEngine;
using UnityEditor;
using UnityEditor.Build;
using System.IO;

public class ExternalScriptableObjectPostprocessBuild : IPostprocessBuild
{
    public int callbackOrder { get { return 0; } }

    public void OnPostprocessBuild(BuildTarget target, string path)
    {
        var settingsObjects = Resources.FindObjectsOfTypeAll<ExternalScriptableObject>();

        foreach(var settings in settingsObjects){
          string dataDir = Path.Combine( Directory.GetParent(path).FullName,Path.GetFileNameWithoutExtension(path)+"_Data");
          Debug.LogFormat("{0} {1}",dataDir,Directory.Exists(dataDir)?"exists":"doesn't exist");
          string filePath = Path.Combine(dataDir,settings.GetFileName());
          File.WriteAllText( filePath, JsonUtility.ToJson( settings, true ) );
        }
    }

}