Beginner question
 

I have two hard drives in my Mac. I have scheduled a Smart Update on a weekly basis for my bootable drive, but am not sure which option to use for my 2nd one.

I want it to replicate the drive that I store all my photos etc on. On reading the user guide I'm still not sure whether to use Smart Update or one of the other options...I want it to replace any files that I may have edited and delete ones that are no longer on the drive. The other options looked easier but I don't think that they delete files, so would it just be better to use Smart Update on both drives?

Thanks

It sounds to me like Smart Upate is what you want, given what you've said.