@rabbiofberlin-
Firstly, like I said if it fell before shabbos, than you should’ve shoveled before shabbos. I have no problem with the OP berating people for not shoveling there snow before shabbos.
So there is muktza, It could be a problem of sosser which I forgot to mention, if the snow is packed together and forms a structure, and it could be a problem of boneh, because you have to put it down somewhere.
As for carrying, chatzi shiur is assur mdrabanon! Just because it’s not a mideorisah daled amos doesn’t mean it’s mutar.
Also I forgot to mention Tircha and uvdin dechol, which is nothing to be sneezed at.
In all likelihood you won’t be over a deorisah but numerous dirabonons
@zehavas dad-
nobody is saying muktza is more important than sakana, It’s that you are the one making it a sakana by going out. If you didn’t go out,the snow would not have walked over and tripped you. and like a previous poster said, if you didn’t realize it was a sakana for you to walk how are you blaming the owner?