Normal reset (Wipe cache partition) Samsung Galaxy S5 :

This reset will not delete any personal data saved on your phone. Wipe cache partition means wiping the most commonly files from the cache stored by system.These files won’t be deleted from your phone in general so it’s SAFE to wipe the cache partition in order to a fresh start of your phone.

1. Power off your smartphone
2. Press and hold “Volume up”, “Home” and “Power” at the same time
3. After the phone vibrates, release the “Power” button but continue to hold “Volume Up” and “home”
4. Once the “Android System Recovery” screen appears, release all the hardware buttons
5. Using the “Volume Down” button, navigate to and highlight “wipe cache partition”
6. Press “Power” to select the option
7. Once the cache partition has been wiped, “Reboot System Now” should be highlighted
8. Press the “Power” key to reboot your device