For this particular case, I would have advised against this vacuum cleaner! Because the vacuum cleaner always wants to return to the station after completing the task, and in case it doesn't find it, it drives through everything until it finds it. To set it up, you have to map everything so that it can find its way around the room. I suspect that you would not be happy with this vacuum cleaner... Unfortunately, I do not have a device tip.

The corners are cleaned by the side brush as well as it can reach the corner, but not 100% in every case, as this side brush does not reach completely into the corner due to the round housing and always gets there equally well. To get the final touch of cleaning, however, a Dreame or Xiaomi battery hoover is also sufficient. The hoover robots usually do not need an additional dock on a second floor. The additional floors are simply cleaned completely and the robot hoover simply stops afterwards.

Yes, the Dreame D9 has three maps. I need two cards, one for the first floor and one for the second floor. Important: the charging station must be on the floor that needs to be vacuumed.
On the 1st use, the Dreame D9 measures the room and creates the layout of the room. All moving obstacles, such as chairs, should be temporarily removed. Forbidden zones can then be entered on the layout afterwards. I find the Dreame D9 to be an ingenious device. One must not forget that the Dreame D9 cannot vacuum the corners. It does not replace a conventional hoover, but it is a great help for us.