Cloning a micro sd card
I found the simplest way to clone a micro sd card, was to use two USB card readers and MiniTool Partition Wizard Pro v7.5. Use the "copy disk wizard" to make an exact copy of the original micro sd card onto the new card. Be patient if you have a lot of data on the original sd card.
If copying a 16gb to a 32gb sd card, you will see a large "unallocated partition" left over. Use the "Move/Resize Partion" to expand to the full 32gb and you're done.