Answer:
I am a creature with a βtightβ name.
If a man carries my burden they will get crushed to death. Though not rich I leave silver in my track.
You write on me and secrets I can keep. In places never seen. I spin like a top. Though stiff as a board I'm often described like a mop.
I go up and down at the same time. Up towards to sky and down towards the ground
What has four wheels and flies?
Give it food and it will live, give it water and it will die.