What I'm lookig to do is very basic.
I want to get a 2nd hard drive or external HD, and have files/folders copied, backedup, mirrored etc..... to it

Features would need to be such that it does this on some schedule, can detech and update only the differences.... even when files have been moved to other folders etc....

Looking for something basic, straightforward, bulletproof.

Note: I have researched this a bit and see a lot mentioned but most seems to be regarding sync'ing across network or to cell phone etc...

My use would be for a single PC with 2 HD's