Question: how to transfer pictures from computer to galaxy s6?
Answer: Your Galaxy S6 came with a microUSB cable. ... 
Your Galaxy S6 should show up as a drive in My Computer or Finder. ... 
Open the Galaxy S6 through My Computer or Finder and open the folder called DCIM, and then the folder called Camera inside there.
Drag and drop the the photos you want to whichever destination is convenient.