Samsung s6 fail.

This morning my Samsung Galaxy s 6 just died on me for no reason. One moment it was working and the next it was just died. It was fully charged but didnt want to respond. I tried plugging it into 4 different chargers but nothing. Not even a light. I tried different button combinations as told on the Internet but stil no response from the device. And whats worries me more is if my phone gets replaced or fixed im loosing all my photos and apps. Who us going to cover the cost of re-downloading all of my applications and music. Im not happy at all.