Hi, just unpacked my new 27" retina. I have always had Macs given to me after a month/two of usage so this is the first time I bought one and have to set it up. Always let the hubbie do it but now i want to do it myself and he's recovering from surgery so I don't want to bother him. Few Questions please before i go further....... 1) How do I back up from the very beginning? Admittedly I doubt i have ever backed up as the rest do. I used to just transfer my documents to a USB key, as well as my photos, music, etc. So i really haven't a clue how to do it properly from the very beginning. I do have a brand new 1 TB Lacie external drive I have not ever used or opened if that helps? Although this is the 1 TB Fusion version. 2) As it does not come with a DVD for the OS, I assumed it would come with a USB key and the OS on it. SO seeing as it does not, what do i use if i ever want to clean the drive etc? Or is there some way of backing it up now Any other hints I might need to be aware of, feel free to point me in the right direction T.I.A.