1. ‘N하고’ is used when listing more than one item. It is often used in spoken Korean while ‘N과/와’ are mostly used only in written Korean. In this case, ‘N하고‘ can be translated into ‘N and’.
2. ‘N하고’ is used to show the person with whom do a certain action. In this case, ‘N하고‘ can be translated into ‘with N’.
● 빵하고 우유를 먹었어요. (I ate some bread and milk.)
● 저는 엄마하고 살아요. (I live with my mom.)