Hello, I am completely new to this forum and really don't know much about computers. My macbook is a little over a year old and it is saying my start up disk is full. Does this mean I need more hard drive space? i am a photographer and have tons of photos and editing software on my laptop along with a lot of music. I need more space asap. It wont even let me edit anymore photos. What do I need to do to gain more space/memory?