SyncBack Free is stunningly powerful. And it's portable, not a single installation file or registry addition is needed. It boasts full automation, total control of profiles in both directions and is just packed with all sorts of options. I've found or more economical. I both sync and backup on a nightly schedule from internal drive to drive (I have a total of five 3TB hdd's in my main system) and from internal to external 3TB and also to a 5-bay 15TB Raid5 NAS. You won't be a bit disappointed in SyncBack.
I am giving Syncback a shot as we speak. Looks like a really nice piece of software! I am really excited about getting this done finally.
Thanks a million.
I will check back with results