I remember just trying this out when I was in school. The idea seemed interesting. It was a folder you could store on portable media like a floppy, a USB, or maybe even a CD-RW(to be crazy). I remember it was still in XP.

It basically worked like manual file syncing. It tried to automate how you'd work on something and keep a portable version of the files up to date.

I seemed to have much more luck just doing the copying myself though...my "briefcase" folder felt clunky and prone to losing files in the worst case, or just being generally confusing.