newbie question
 

Sytuation:
On my Macpro I have 2 internal (250gig) drives, and 2 external(500gig) Esata drives.
One for the system and applications.
One for my data (photos and docs)
The system drive is backuped with TimeMachine on the external Esata1 excluding to back up the data drive
The data drive is cloned with SD! on the second external Esata2.

Question:
Can I configure SD! to backup my data, that it keeps different copies, so that I can go back in time 3 days or so in case of a problem?

Right now I use Backup - all files - smart update scheduling every night.
But it overwrites the files from yesterday.
Using copy "newer files" or "copy different files" I will end up with a full drive soon or later, I think.

Is there some function like clone the Data disc every night and keep the 3 most recent versions (so overwrite the version from 3 days ago very time it's scheduled)

You can rotate three copies, but you'd need three separate volumes (partitions) on the drive you're backing up to.