but, Yes, once you plug your MacBook back into the home network and you activate Carbonite, it will start to backup everything that has changed since the last backup.
On that note, if your external is used for Time Machine, the same applies.
Have a great vacation.
This may sound stupid, but we are going to be camping for over three weeks, am taking the MacBook but I had not planned on taking my external HD. I have Carbonite and wonder if when we return home and I plug the external HD back in, will it catch up with what has been added?
Thanks, Old Granny Lola