How to safely shut down or force shut down Samsung devices

Samsung Galaxy Note 4 Duos Samsung Galaxy Note 4 Duos
Samsung Galaxy Note Edge Samsung Galaxy Note Edge
Samsung Galaxy Ace Style LTE G357 Samsung Galaxy Ace Style LTE G357
Samsung Galaxy Grand Prime Samsung Galaxy Grand Prime
Samsung Galaxy Grand Prime Duos TV Samsung Galaxy Grand Prime Duos TV
Samsung Galaxy V Samsung Galaxy V
Samsung Galaxy Pocket 2 Samsung Galaxy Pocket 2
Samsung Galaxy S5 Plus Samsung Galaxy S5 Plus
Samsung Galaxy A3 Samsung Galaxy A3
Samsung Galaxy A3 Duos Samsung Galaxy A3 Duos
Samsung Galaxy A5 Samsung Galaxy A5
Samsung Galaxy A5 Duos Samsung Galaxy A5 Duos
Samsung Galaxy Core Prime Samsung Galaxy Core Prime
Samsung Galaxy E5 Samsung Galaxy E5
Samsung Galaxy E7 Samsung Galaxy E7
Samsung Galaxy Grand Max Samsung Galaxy Grand Max
Samsung Galaxy A7 Samsung Galaxy A7
Samsung Galaxy A7 Duos Samsung Galaxy A7 Duos
Samsung Galaxy Tab 3 Lite 7.0 VE Samsung Galaxy Tab 3 Lite 7.0 VE
Samsung Galaxy J2 Samsung Galaxy J2