There are a few things that users could’ve overlooked that may cause an Airdrop error. First, check if Bluetooth is turned on. 1. To do this, go to Settings and check if there is a green button next to the Bluetooth feature. 2. If it is turned on, check if your devices are discoverable. Tap on Allow New Connections to do so. This will allow the other iPhone to detect your device and connect to it. Also, check if the Airdrop feature is turned on. 1. Go to Settings > General > Airdrop and turn it on if needed. If it is on, and the setting is on Contacts Only change it to Everyone. You can turn this off later. Lastly, check if there are any hotspots turned on and turn them off; make sure to check this on both phones. It’s also a good idea to ensure that the receiving iPhone has enough space to receive all the files if you are sending multiple at a time.