Device and PC connection

Airone53

Good evening, I'm new and inexperienced on the subject. I need clarification on one step to connect my TomTom Start 60 to MyDriveConnect. The pc is connected to the navigator. I can't understand what I have to write to enter Mydrive when he asks me under the Start 60 figure "custom_name_placeholder". I tried to give a name but he doesn't accept it. Can you help me? Thanks and best regards.