Samsung is known to pre-load a lot of applications a.k.a bloatware on its Galaxy devices. When the Galaxy S4 was unveiled last year, the company received a lot of flak because its bundled applications left only about 9GB of free internal storage space on the 16GB variant.
This year, things have actually gotten worse as the 16GB Galaxy S5 only comes with 8GB of free internal storage space out-of-the-box.