A Folder Action script written in AppleScript used to separate AirDropped files into a different folder other than the default Downloads folder. See: https://www.idownloadblog.com/2017/03/03/change-airdrop-destination-folder-mac/

AirdropSorter.scpt

property AIRDROP_FOLDER : "Path:to:AirDrop:Folder:in:Alias:format"
property QUARANTINE_KEY : "59"

property GET_QUARANTINE_COMMAND_START : "ls -l -@ '"
property GET_QUARANTINE_COMMAND_END : "' | tr '\\n' ' ' | sed 's/.*com\\.apple\\.quarantine\\s*\\(\\d*\\)/ \\1/' | awk '{$1=$1};1'"

on adding folder items to this_folder after receiving added_items
	repeat with i from 1 to length of added_items
		set current_item to item i of added_items
		set quarantine_type to getQuarantineType(POSIX path of current_item)
		if quarantine_type is equal to QUARANTINE_KEY then
			moveFile(current_item, alias AIRDROP_FOLDER)
		end if
	end repeat
end adding folder items to

on moveFile(move_file, destination_dir)
	tell application "Finder"
		move move_file to destination_dir with replacing
	end tell
end moveFile

on getQuarantineType(file_path)
	return do shell script GET_QUARANTINE_COMMAND_START & file_path & GET_QUARANTINE_COMMAND_END
end getQuarantineType