Hi everyone, I hope this is the right forum for this question. Sorry if it's not. And I also apologize if this has already been answered. I did try searching around, but didn't find anything... I wasn't sure of exactly what to search for either. I have a Time Capsule that is set up as my Time Machine drive. I have it configured to back up both the internal hard drive on my laptop as well as an external drive that I keep hooked up to my laptop most of the time. I realized in the past few weeks that any time I eject and then reconnect the external hard drive to my laptop, Time Machine tries to back up the entire contents of the external drive again - it's 400+ gigs and it takes a very long time. I'm wondering if that is the expected behavior. Shouldn't Time Machine just back up what has changed on the hard drive, instead of the whole thing every time? Any idea why it would be trying to back up the entire hard drive again whenever I plug it in to my laptop? And is there any way to get it to stop doing that? Any help would be greatly appreciated.