Turn off AirDrop when using public Wi-Fi

If you’re using the same network as strangers, set limits for file sharing so that nobody can intercept your messages or send you unwanted files. If you’re on a Mac, go to Finder, click on AirDrop, then find the setting called “allow me to be discovered by” and switch it to “no one.”  You can also simply disable Bluetooth to stop all AirDrops.