I have recently purchased WD My Book Studio Edition II. Before I back up my files/system, i ran into Apple's tutorial on website: I have a Snow Leopard in place and will install after I do the backup: Question, How/What is the best step to back up all system files before I do a clean install on my Mac and run Snow.....then backup my files. Using Time Machine: And then...use Restore System from Backup feature of the Mac OS X Installer. Or should I back up manually. This is rather an intermediate-expert level already. Just want to make sure before I mess up. Thanks for the help.