Not knowing your specifc model. So,these are some general steps.
From a Home screen, navigate: Apps > My Files.
Note These instructions apply to Standard mode only.
Select an option (e.g., Images, Audio, etc.).
Tap the Menu icon Menu button (upper-right).
Tap Select then select (check) the desired file(s).
Tap the Menu icon.
Tap SD (Memory) Card.
Navigate to the preferred folder then tap MOVE HERE (upper-right).