How does Lightroom store data about photos?
I've seen numerous mentions of Lightroom's database, or catalog, and having to back it up. Being used to Bridge and Camera Raw, I'm accustomed to seeing sidecar .xmp files alongside my RAW files. These can easily be backed up with my RAW files since they are actual files.Does Lightroom use sidecar files, same as Bridge, or does it use its own database for storage of image tags, metadata, etc? Or is it some combination?