I've been using lumia 925 for almost 3 years now.
Love the phone to bits but got put off by the occasional hangs & crashes.
Then I've checked the storage, apparently the system files size are getting larger & larger.

How the hell do i prevent this from happening?

Fyi, i've formatted the phone & reset the phone to fresh,clean state previously.
So far so good but now as my storage is getting bigger, no thanks to the ever growing System files and of course the frequent hangs & crashes, i'm almost giving up already. I don't want to format & reset my phone everytime this damn problem occurs again!
Felt that i want to shift to Iphone SE...

Can the sifus here pls give some enlightment on how to prevent the damn System files from growing bigger by the day??