Samsung SCH-R460WRACRI - Manual (Page 85)

Multimedia 82
Multimedia ➔ My Sounds. A list of sound files appears in
the display.
2. Highlight a voice memo file.
3. Press the Options soft key.
4. Select Erase all.You are prompted to confirm erasure of all
recorded sound (voice memo) files.
5. Press the Yes soft key to erase all of the selected recorded
sound files or press the No soft key to return to the list of
sound files.