I've recently downloaded this piece of software for keeping a synced backup of vital work files between my laptop and an external harddrive as i tend to work off both. Its great for keeping them perfectly in sync and i will continue using the software.

The only problem i have with the software is once i've run a sync it does not free up the RAM it has used so if i want to run parallels or anything that uses more than a couple hundred gigs of RAM i have to reboot to release it.

But otherwise a great piece of software!