A student wishes to share contacts with another student's mobile device. Which of the following would be the easiest method to use?

Network attached storage (NAS) is a centralized storage device on a network, which would be overly complex and indirect for a simple direct transfer between two mobile devices.

Bluetooth sharing is specifically designed for short-range wireless communication between devices, making it the easiest and most convenient method for two mobile devices in close proximity to exchange small data like contacts directly, without needing a network connection or intermediary storage.

A local hard drive is an internal component of a computer, not a method for directly sharing data between two mobile devices.

Setting up a peer-to-peer network between two mobile devices, while possible, is generally more complex than simply using Bluetooth for a quick contact exchange.