for all who achieved the hyrule castle:

how can you reach to the room or yard the map indicates on the first floor with 2 or 3 chests, also I think there is the key to the room in last floor with the 3 chests!! Do anyone reached those 2 rooms????????

Do you mean near the part with the spinnable pillars, where Midna says that you should check out the other side of the wall? Try digging under it.