Download Samsung Smart Switch Mobile
This also works for any android phone/IOS phone switching to Samsung phone. Download this app for both devices. For both phones, press "Android to Galaxy", and hold them close together. For the old phone, check the items that you want to send, then press "Transfer". If that doesn't transfer, use the "Connect device manually" option in the menu. This should take a relatively short amount of time.

Switch (micro)SD cards
Well, duh...