I think it's better to use your file manager.
From the Internal storage tab, tap the appropriate folder (e.g., Music, Pictures, Ringtones, etc.).
If desired, open the folder to select files.
Tap Menu Menu icon (located in the upper-right).
Tap Move or Copy.
Tap (check) the desired file(s).
Tap Copy (located in the lower-right).
Tap SD card.
Navigate to the preferred folder then tap OK.