Default Prob been asked before

On a HTC buzz a friend installed what's app facebook and one other app and its saying its memory is full can I keep it to factory but be able to use the ad card as the app storage I never rooted a phone so if there a idiots way of 1 click and done I did go into apps and mover to sd but the apps fell apart

Thanks for any help

Sent from my HTC Desire X using xda app-developers app