Backing up your Samsung Galaxy S4 is a very important activity that allows you to prevent important personal data and multimedia files from being lost in case of software malfunction or lost device. You can back up your Galaxy S4, either by saving all data on Google's servers or by copying it to your SIM card, SD card or computer.
Steps
Method 1 of 5: Back Up Applications to Google Servers

Step 1. Select the "Menu" button, then choose the "Settings" item

Step 2. Select the "Accounts" item, then scroll through the list and choose the "Backup and Restore" option

Step 3. Select the "Backup personal data" checkbox
Google will automatically start data synchronization by backing up all your favorites, applications and other data on your device, saving them on its servers.
Method 2 of 5: Back Up Contacts to SIM / SD Card

Step 1. Select the "Menu" button, then choose the "Contacts" item

Step 2. Select the "Menu" button and choose the "Import / Export" option

Step 3. You can choose either "Export to SIM card" or "Export to SD card" option
The choice depends on your needs.

Step 4. Press the "OK" button to confirm exporting the contacts
Your contact data will be copied to the selected media.
Method 3 of 5: Back Up Media Files to SD Card

Step 1. Select the "Applications" icon from the Home of your Samsung Galaxy S4

Step 2. Select the "Archive" icon, then choose the "All files" folder

Step 3. Press the "Menu" button, then choose the "Select All" option

Step 4. Press the "Menu" button, then choose the "Copy" option

Step 5. Select the "Memory Card" option

Step 6. Choose the "Paste" item
All media files on the device will be copied to the SD card.
Method 4 of 5: Back Up Media Files on Windows Computer

Step 1. Connect the Galaxy S4 to your computer using a USB data cable

Step 2. Wait for the computer to detect the Galaxy S4
The "Autoplay" window will appear on the screen as soon as Windows detects the device.
Make sure the phone is not locked by some form of security key, otherwise the device will not allow you to view files on the computer

Step 3. Select the "Open device to view files using Windows Explorer" item

Step 4. From the Explorer window, select the device icon located in the side menu available on the left of the window

Step 5. Choose the files you want to save, then drag them to the desired folder on your computer

Step 6. After copying is complete, disconnect the Galaxy S4 from the computer and the USB cable
Method 5 of 5: Back Up Media Files on Mac OS X

Step 1. Access the Samsung Kies official website using the following URL

Step 2. Select the option to download and install the software for Mac OS X
Samsung Kies program is required to be able to transfer files from device to computer and vice versa.

Step 3. Connect the Galaxy S4 to your computer using a USB data cable

Step 4. Launch the Samsung Kies program on your computer in case you haven't already

Step 5. Select the "Backup / Restore" tab of the program

Step 6. Select the "Select all items" checkbox

Step 7. Press the "Backup" button when finished
" The selected files will be saved on your computer through the Samsung Kies program.