Daylight, near a window, no flash. Phone cameras are good; kitchen lighting is not.
One plain background. A floor or a wall will do. The item should be the only thing in the frame.
Every angle, plus the label, the serial number or the model badge.
Photograph the damage. A scuff you have shown is a detail; a scuff the buyer finds is a dispute.
Photos are compressed when you upload them, so a big camera file is fine. It will not slow your listing down.
