Andrew,

No it does not originate from someone's question on this forum.
I have had this question posed before and did try a few sync programs.
I have found SyncBack to be head and shoulders above the rest.

We should ask others how they administrate their backups?
What is the best method (regardless of tool you use) to backup your CAD info?
What do you do to keep your links set correctly? (and so on..)

PS: Microsoft has released a "free" version too.
I have tried it, and found it wanting.

WB