When I encountered Nordri, he was in the midst of moving several chests of treasure.  He paused to talk about his job and his duties.  He transported the Thane’s treasure and belongings.  When the Thane wanted to move between his residences around the city, he would be responsible for moving the Thane’s most desired items to his next residence.  Some were trinkets, others jewelry, sometimes they were paintings or statues he would want with him.  Whatever his Thane wanted, his job was to make sure it was done for his Thane.