I'm pretty ignorant on syncing and sharing issues, so please bear with me.... I'm currently running a Mini as my home desktop and a Macbook Air as my mobile unit. I'd like to keep the same set of master folders (Business, Personal, Pictures, etc.) in both computer's Home folders, and have the contents of these master folders stay in sync with other. I could create versions of the master folders in iCloud, but each master folder also has countless smaller folder within it -- and iCloud doesn't let me copy folders over; only files. Also, I'd rather have up-to-date sets of master folders on each hard drive, not just in the cloud. Currently my old-school solution is to simply use the Mini as the "hero" unit, copy updated master folders to a USB key once a week, and then work from the USB key on the Air. But there's got to be a better way.... Any recommendations to suit what I'm trying to do?