I realise that Finder is similar in a way to explorer on a windows pc. But when I transfered my music and pics over from my pc. Then moved said items to itunes and iPhoto respectively. Do I have to keep the files in finder as backup. Or can I delete!!?! (Waiting on delivery of external back up drive. So music and photos will surely be backed up there) Also I'm expecting my replacement 21" today so will have to do the transfer again. Can I just select the itunes and iPhoto folders instead of moving everything across? I was cleaning up finder last night. And deleted a few folders I didn't need. And noticed there are gaps left (music). Shouldn't they close up?