Your Galaxy S9 sports a microSD memory card reader. If your laptop or personal computer can also read that card format (Most laptop computers are so-equipped), you should be able to transfer music files
The Samsung Galaxy S9 is an Android smartphone and the Android market offers a bunch of free ringtone apps such as MP3 Ringtone Maker, Myxer and more.
Here is a sample of the free ringtones (compatible with your Samsung Galaxy S9) we offer:
Free Horror Ringtones Free Ghost Ringtones Free Short Ringtones Free Far West Ringtones Hear All Our Free Polyphonic Ringtones