Question:

Why can't I transfer music files using the Galaxy Wearable app or USB connector to my Gear IconX (SM-R140)?

Answer:

With the release of Android R OS, transferring files through the Galaxy Wearable app or USB connector from a mobile phone running on this operating system to the Gear IconX (SM-R140) has been disabled. To successfully transfer music files between your PC and your Gear IconX, use the PC manager program and connect the devices with an USB cable.