Heya!!! =] I have a 750GB external HD for my future macbook pro which i will be ordering in about a week, i wont be able to lug my external hd around with me, so after a day at uni when i come home and plug in the external HD will time machine backup everything i had did in that day or will it only log changes that are made when its plugged in? And also how fast and effective is an external hd used through firewire 800 when plugged in to a cinema display that it then plugged into a macbook pro? i will be doing video editing etc, will this lag much? Thanks. Edit- can i also partion a certain amount of that 750 GB HD for time machine, and also how much should i choose to partion for a 200gb HD? and again also, will time machine be able to go back in time through the screen shots as it does if some of the data that i was using was also saved onto say that same external HD or a flashdrive?