Hi Guys, I am now 2 weeks into the world of Apple and loving it. It takes a while to get used to the differences between the PC but I am slowly remembering the keyboard shortcuts... It's great. One question: I need to start a time machine back-up and have about 100 gig of files that will go on a 2nd HD (cunningly kept from upgrading my MB manually and put in an Icy Box Enclosure.. So, how long will this back-up take on a USB external HD (100gigs to back-up). Hours? The reason I ask is that I am encoding loads of DVDs on handbrake and do not know whether to leave the back-up overnight or "The Best of Bowie" DVD encoding overnight ;-) Thanks for any info. Apologies if this may be in the wrong section.