If using a Macintosh computer, additional software is required in order to transfer files.
For a quick overview of Verizon Cloud, watch this video.
Connect the device to a computer using the supplied USB cable.
If prompted to allow access to your data, tap ALLOW.
Touch and hold the Status bar (at the top) then drag to the bottom.
The image below is an example.
From the Android System section, ensure File Transfer is selected.
If necessary, select the current option (e.g., USB Charging, Photo Transfer, etc.) then tap File Transfer.
Launch File Explorer or Windows Explorer.
Using the computer keyboard, press Windows+E ( +E) keys.
Alternatively, right-click Start then click Open Windows Explorer or File Explorer.
Using File or Windows Explorer, navigate: Galaxy S9 > Phone > Music.
Galaxy S9 is listed under the Portable Devices section.
If the files are stored on the memory card, navigate: Galaxy S9 > Card then choose the location of the files.
Utilize the computer to copy music files from the music folder to the desired location on the computer's hard drive.