I use a few apps for that.

by R. Proffitt Moderator - 1/1/13 10:52 AM

In Reply to: Simple file backup (I miss bac.com) by mvwoolner

In the GUI category I use SyncBack and GoodSync.

For the command line you see them at https://www.google.com/search?hl=en&as_q=command+line+file+sync

Bob