Option B

MusicAssetList.cs

#region usings

using UnityEngine;
#if UNITY_EDITOR
using UnityEditor;
#endif
//using UnityEngine.UI;
//using UnityEngine.SceneManagement;
//using System;
//using System.Collections;
using System.Collections.Generic;

#endregion

#region Script

namespace ZeredaGamesEngine.Core.MusicListsExamples.Example3
{
    #region Attributes

    //[RequireComponent (typeof())]
    [System.Serializable]

    #endregion
    [CreateAssetMenu(menuName = "My custom button name", fileName = "NewInstanceOf_MyScriptableObject.asset")]
    public class MusicAssetList : ScriptableObject
    {

        public List<AudioClip> PlayList = new List<AudioClip>();
        static MusicAssetList asset =null;
        public static bool DebugMode;

        public static string Path = "Assets/Resources";
        public static string FolderName = "Music";
        public static string AssetName = "NewAsset";

        #if UNITY_EDITOR
        [MenuItem("ZeredaGames/Game Making Editor Tools/Create Playlist/General Music", false, 1)]
        public static MusicAssetList CreateNewAsset()
        {
            //Of the ScriptableObject "asset".
            asset = ScriptableObject.CreateInstance<MusicAssetList>();
            //in the Folder Assets/Resources/GeneralGameAssets/AssetName.asset.
            AssetDatabase.CreateAsset(asset, Path + "/" + FolderName + "/" + AssetName + ".asset");
            if (DebugMode)
                Debug.Log("New Asset Created in: " + FolderName + " @ setPath(" + Path + FolderName + "/" + AssetName + ".asset) \t AssetName");
            //and than saves it there .
            AssetDatabase.SaveAssets();
            //Set Unity's selection.
            Selection.activeObject = asset;
            //Focus on that selection.
            EditorUtility.FocusProjectWindow();
            //Return the asset.
            return asset;
        }
        #endif
    }
}

#endregion