Steve,
Thanks.
Scripts are a bit too technical for me. I get the logic and sure that I can get a hang of it.,
but if I am not mistaken that works as "files" backup, not actually adding to the backup "image".

I have tried SyncToy in the past. If I am not mistaken, it sees Source-->Target and makes them same (and few other options)

Maybe I am wrong and when disk is cloned, I can still write the changes to it (syncing) with running drive? I thought that when you do a Windows backup it is compacted to some creepy format, not folder tree structure..