new HD

Hi Was wondering if someone could give me some easy pointers to do this i have this HD that is running my suse 7.1 with other things and the HD is 6.1 gigs i have an new HD and it is 40 gigs and what i would like to do is move all that is on the 6.1 to the 40 gig and then remove the 6.1 gigs and have the system running as i do now can someone tell me how i can maybe do this thanks Bob