Question: how to transfer data to sd card on lg phone?
Answer: From a Home screen, navigate: Apps > Tools. ... 
Tap All files.
Tap Internal storage.
Tap the appropriate folder (e.g., Music, Pictures, Ringtones, etc.)
Select a file(s).
Tap Move or Copy. ... 
Tap (check) the desired file(s).
Tap Copy (located in the lower-right).