How I do correctly push my storage items to my array list?

Ionic Framework ionic-v3
1

My code like this. I seen on my console correctly values. But i cant use my array list in another function. My storage items seening as undefined. Please help me!

this.storage.forEach((value, key) => {
    if (key == 'favoriteStory') {
      //console.log("value", value);
      this.item = value.toString();
      this.myItems.unshift(this.item);
    }
 })