Transfer media to your microSD card
Just insert your microSD card and you can begin transferring your files. You can also use the options in Device care to help clear space.
First, insert your microSD card, navigate to the Samsung folder, and then tap My Files. Find the file(s) you want to move, and then touch and hold the file(s). Tap Move or Copy at the bottom of the screen, and then navigate back to the My Files Home page. Tap SD card - this will only show up if you have a SD card inserted. Then, tap Move here or Copy here.
Note: You can only move or copy files this way in the My Files app. You cannot move or copy files to other apps, such as Gallery.