We have an iPad coming in a week or so, and I feel like a real dummy, not knowing what happens when you sync music, apps, etc. from iTunes. I did read part of the user guide, but it doesn't really give much info on that. Does syncing mean the files are copied or moved from the computer to the iPad? If you have files on there that are not recognized by iPad, will they be synced even though they can not be used? More questions to come, and all help will be appreciated. This is our first i-gadget, so I have to learn from ground zero.