Question: how to transfer files from galaxy tab 10.1 to sd card?
Answer: From a Home screen, tap the Apps icon . ... 
From the Apps tab, tap My Files.
Navigate: sdcard0 > DCIM > Camera.
Tap the desired image(s) or video(s) ... 
Tap Copy or Cut. ... 
From the navigation column (located on the left) tap extSdCard.