SyncIt is a simple application to assist you in backing up important documents and files. It's initial release was created in less than 24 hours and as far as I can tell, it works great. I am currently using this application to mirror 4 hard drives at home.
It's features include saving the locations once you've entered them, mirroring the locations, and optimized run times. The interface was changed several times before I was at a point that I was happy with. I wanted a intuitive layout for every-day users that followed Apple's basic folder organization.
