Copy a dvd

Question

I was wondering, I have a bunch of dvds of movies I have boughten over the years. I would like to make backups of all of these dvds so nothing ever happens to them. does anyone know how to do this. I found a way to put a dvd on my computer but it does not let me copy it because of a copy protection thing Does anyone know how I can bypass this?? or what i can do to make copys of my dvds?