I’m using Mac OSX and have been running Carbonite as my external backup. It seems that when the Carbonite did the automatic backup, while I was working on a SBPro project, all of the drawing files for said project disappeared, leaving me with hundreds of blank panels. Very scary! So! Be advised! Myself, I’m disabling the Carbonite automatic backup and am switching to manual in conjunction with an external hard drive. If anyone has had a similar experience, I for one would love to read about it. Peace!