Taking a shed apart? Didn't really know where to post this.

I guess maybe not all the way yard maintainance related but have a job pending tomorrow to break down this shed and put everything with all contents in a dumpster. Wanting to flatten out shed best as possible and was wondering the best tool and or method to piece out the shed? The metal seems kinda thin so not sure if a sledge hammer may break it apart good or some cutting tool? Again sorry if posted in the wrong section. Thanks.

Brian