Ok, I am a little behidn in times meaning, I have not used Time machine. I have a 2006 macbook which I am planning to replace with a MBA 128gb. I have a 1tb external HDD and 500 gb portable external HDD. The 500gb portabel holds movies and is connected to my TV to access movies in it and is formatted in NTFS so that it can write 4 gb or larger files as well as thats the format the tv recognizes. I want to point the itunes and iphoto library to the external HDD so that I can have space on my MBA. I also want to be able to back up to the external drive? Do I have to do the backup manually or TM will do it automatically if the external drive is conencted? Now I have all teh pcitures in folders in my external drive, how will I be able to get them into the iphoto library when I get the new MBA.