What are the three ways to store images and which is preferred?

1. Add a Product Image from a Content Delivery Network You can reference an image file served from a central file repository, such as content delivery network (CDN), using a uniform resource identifier (URI). We recommend this option for your image files whenever possible because it's the easiest way to maintain your images from a single managed location. 2. Add a Product Image from a Static Resource You can reference an image file included in a static resource when specifying the image for a product. You can bundle multiple image files together in a single static resource, and reference the static resources across multiple records. Attach a Product Image Directly to a Record 3. You can attach an image file directly to a CC Product Media record.