Hi, I want to clear out my system because I feel I have so much crap on it and need to gain some space back. I wonder if you could help me with some questions. What should I do to back-up my apps? Do I just need to back-up my apps folder? Or do I need to do something more? Will my iPhoto library be OK if I just back up the file from the Pictures folder? How do I back up my iTunes library? I don't want to use time machine, I just want to copy the folders to an external HDD. Thanks, Ams.