Question: how to transfer internal storage to sd card lg?
Answer: From a Home screen, navigate: Apps. > Tools > File Manager.
Tap All files.
Tap Internal storage.
Navigate to the appropriate folder (e.g., DCIM > Camera). ... 
Tap Move or Copy. ... 
Tap (check) the appropriate file(s).
Tap Move or Copy (located in the lower-right).
Tap SD / Memory Card.