The easiest way to back up your data is using an application called Smart Switch. This is a free program developed by Samsung. Using Smart Switch to back up your phone will let you restore your content to a new device. You can download Smart Switch to your computer here: http://www.samsung.com/ca/support/smartswitch/
Once you have Smart Switch installed on your computer, connect your phone to your computer using a USB cable. From the main screen, you will need to select the “Backup” tab. This will begin the Data backup.
From here, you will have to allow Smart Switch access to your phone. Please click “Allow” on the pop up that will appear on your phone. After this, your phone should be successfully backed up!