I got curious about this today, and didn’t feel like going outside, in spite of a beautiful Saturday. Just one of those days! http://lividinstruments.com/dl/tagDatabase.zip
To figure this out, I used a nice example I found from searching:
Yes, it seems to store to disk by default when you open a database. In the example, the file is saved to the same folder as the Max application. When you open it the next time, it loads all the contents.