If you were concerned about 20 meg images and photo stroage - try storing THIS one !!
It weighs in at 111 Gigapixels, was made with the Canon 5D mark II and a 400mm-lens.
It consists of 1.665 full format pictures with 21.4 mega pixel, which was
recorded by a photo-robot in 172 minutes. The converting of 102 GB raw
Data by a computer with a main memory cache of 48 GB and 16 processors took
94 hours. The picture is supposed to be the largest in the world.