What makes an USB pen drive expensive? No it is not its storage capacity. It is the precious stones and metals encrusted on the body of this small storage device that boosts its price. Embellishing a simple 32GB pen drive with gem stones can boost its price by several thousands of dollars. Although these stones do not add any functionality to the device, nevertheless, when products are designed for affluent users it is the appearance and price that matter most. The world’s most expensive USB pen drive is a mushroom shaped storage device studded with diamonds, emeralds and rubies. Designed by the Swiss jeweler La Maison Shawish, the 32GB USB pen drive is priced at $37,000.