I suspect you are asking multiple short questions about the S6 Edge Plus without registering, as I have seen many similar basic questions in a short span of time. Please consider registering on these forums so that you can continue the conversation in the thread you started. Otherwise, the forum gets flooded with many of these very basic questions whose answers can be found by simply looking at the specs: Samsung Galaxy S6 edge+ specs
You can never increase the RAM in any mobile device (be it Android, iPhone, Windows Phone, or Blackberry), nor can you increase the internal storage. The Edge Plus does not have a microSD slot, so you can't expand the media storage for it either.