Yup Three as lardy as everWhen i applied my update it wiped out 15% battery overnight when it was off :s No idea why, it's never done that before, usually it loses 1% overnight. A partition cache delete sorted that though.
Does a partition cache delete affect anything on the phone?
No, its perfectly safe and a recommended thing to do after an update.
Oooohhh OK, cool .. next question .. how do you do it lol
http://recomhub.com/blog/how-to-clear-cache-on-galaxy-s7-and-galaxy-s7-edge/
Read the 2nd half, how to clear the system cache.