How to change back wheel drum?

I have a Ford Fiesta 02 plate I need to replace the back wheel drum is it easy to do or how do I do it help please thanks

Changing the brake drum is easy ; after the rear of the vehicle is raised and supported by a jack stand, remove the rear tire, then the brake drum and replace in opposite order

Hi after removing the wheel there's a screw which holds the brake drum on this cross headed screw sometimes is rusted in so liberal amounts of a penetrating oil or wd40 appplied and left to soak for a hour sometimes make the removal of this screw possible. Then the brake drum should just come off. A tap with a hammer around the drum also will help it to come off. I did say tap not hitting without vegance