I have a new external HD I plan to use with my MacBook for regular backup. I've always used SuperDuper and had good luck with it. Once I backup the entire drive, I use Smart Update, which seems quite similar to what Time Machine does. Do you prefer one over the other? Thank you in advance for any replies. p.s. let me add: I won't be connecting this drive every day. More like once a week. So some of the features of Time Machine might not be as relevant? Thanks.