For starters, AirDrop uses WiFi and Bluetooth to establish a connection between your iPhone and Mac or any Apple device for that matter. Now, while sending large files, your iPhone may go into sleep, causing the transfer to fail or halt midway.

Why do my airdrops keep failing?

Another common error that causes AirDrop problems is to forget that your device is in Airplane Mode or in Do Not Disturb. Airplane Mode disabled all wireless radios including Wi-Fi and Bluetooth that AirDrop relies on to operate. ... Do Not Disturb in iOS devices and on the Mac can prevent AirDrop from working correctly.

Does AirDrop have a limit?

And the simplest of all is a built-in feature you've surely heard of called AirDrop, which has no file size limit.