Trying to save as Object Array but keeps getting saved as Array of Array

thanks @RezaRahmati had to change save() to

save(data): Promise<any> {

   return this.getData().then((products: any[]) => {
   if (products) {
     products = products.concat(data);
     return this.storage.set('products', products);
   }
   return this.storage.set('products', data);
   });
}