Your Advance A5 LTE sports a microSD memory card slot. If your laptop or personal computer is compatible with that card format (Most laptops are so-equipped), you should be able to transfer a music file
The BLU Advance A5 LTE is an Android smartphone and the Android market offers a bunch of free ringtone apps such as MP3 Ringtone Maker, RingDroid (open source) and more.
Here are some of the free ringtones (compatible with your BLU Advance A5 LTE) we offer:
Free Horror Ringtones Free Ghost Ringtones Free Ringtones-a-gogo Free Techno Ringtones Hear All Our Free Polyphonic Ringtones