Time Machine Question

[Nitro1]

From what i know Time Machine backs up everything you want it to everytime corect?
I am trying to find out if there is a way to make it so time machine is smart. Thus only backing up the changes that are made. So then i will not be making a completly new back up everytime i try to do it, and using up a tron of storage space.

Am i correct in saying that???? I have a friend who says her's only backs up the changes that are made each week or each time she backs up. Is that a setting i am missing.

Any help would be amazing.

 

[maflynn]

Time Machine only backs everything up once and then after that it only backs up the deltas. It would be way too time consuming to do a full backup every hour.

By default TM runs every hour and backs up only the changes.