The more gigabytes you have, the more content you can store on your iPhone, such as apps, games, photos, HD videos, music, and movies. For example, if you have a large music or photo library or lots of apps, it’s a good idea to consider an iPhone with a larger storage capacity. If you rarely download apps or you don’t take many photos or videos, an iPhone with a smaller capacity may be better for you. When deciding which size to choose, be sure to consider how your storage needs may change over time.