From a Home screen, swipe up from the center of the display to access the apps screen.
Tap File Manager.
Select the LOCAL tab (at the top).
Navigate to the location where your files are stored.
Touch and hold the desired folder(s) to copy or move.
Selected when a checkmark is present.
If an option is unavailable (grayed out), that media type is not currently stored within the internal storage.
Tap the Menu icon (upper-right) then tap Select all to select all files / folders.
Tap the Menu icon then select 'Move' or 'Copy'.
Tap the Back arrow several times until the SD card folder displays.
Tap SD card then navigate to the location where you want to put the file(s).