My database is party managed and most of it is referenced. There are several other posts related to back-up strategies. The way to check your back-up stategy is to actually try to restore something.. I'm trusting the Time capsule as my a hourly back-up for the aperture database. When you open time capsule to retore a old copy of a version I'm unable to see it, the application database is closed. I guess I need to work on a better routine too and start reading the manual.