Samsung got some heat for how much free storage is available on the Galaxy S4 out of the box and the company promised (http://blog.gsmarena.com/samsung-promises-to-address-available-internal-memory-on-galaxy-s4/) to look for ways to increase it. A new update that hit S4s in Germany is a step in the right direction.
The update (XXUBMEA) weighs in at 366MB and after installing it you get 9.23GB of free storage, up from 9.15GB (on a 16GB model). It's not much, but the update does bring a proper way to free up some space