In rekordbox for iOS (ver. 3), the process for making a wired connection has changed from the previous method of connecting from a USB Type-A terminal to a USB Type-B terminal.
To learn how to connect, click here.
Traditional connection methods limit file transfer speed, and file formats such as WAV/AIFF and FLAC/ALAC can’t be used.
With rekordbox for iOS (ver. 3), we've changed the wired connection method to allow these file formats, and to improve stability.