Android has a built-in cloud backup that can transfer certain things to the new device, and if you activate it, the backups are made at night when the phone has power and Wi-Fi. There is also an app from Samsung. Certain apps like Whatsapp can export their data to the microSD card for migration. And files can generally be transferred from the microSD card to the new device. Personally, I haven't used the Samsung app because the reviews aren't that good.