Converting .vyf voice recordings to .mp3 audio format.
This is not the most common conversion request, you should, however, still be able to convert Samsung Digital Voice Recorder Files directly to MP3 Audio Files (.vyf to .mp3 conversion). Your options seem to be quite limited.
Using Softe Audio Tools might be your best option to convert VYF to MP3.
A multi-purpose audio software with high-performance for managing, playing, converting merging and splitting tons of audio/ video files.