I have an ibook I bought last year with 40gb on the hard drive. I just recently started to use it to store music in itunes. I have filled up all the space and cannot add any more disks. What should I do? But a new 80gb hard drive and have it installed? Buy an external drive or ....? Please keep in mind that I am pretty computer illiterate and will have to pay for a technician to install everything but the most basic of products. Thanks.