AirDrop is a component service of Apple's macOS and iOS operating systems. It allows users to transfer files to another AirDrop-supported Apple device without using e-mail or a removable disk. On macOS, AirDrop operates over a direct Wi-Fi connection, and in iOS, it operates over either WiFi or Bluetooth.
How big of file can be transferred over AirDrop?
There's no limit to the size of file that is transferred over AirDrop, but the two devices must be within 10 meters of each other.