[unboggling]

@kacir, so you use just one library for everything?, do a pass (requiring months maybe?) to work by author from A to Z, meanwhile adding whatever you download, then start over with A-Z iteratively forever? Or do you eventually move the "clear" ones to a Clear Library?

I keep all downloaded formats, even when they are many or bad, in a Raw Books folder on a 2TB hard drive and try to use only the best of each lot inside calibre. For example, after trashing everything and restarting I downloaded all the free Baen CDs, put them in expanded folders into Raw Books/Pending/Baen CDs/CDnameFolder and started adding only the best EPUB or in a few cases a MOBI if no EPUB, one CD at a time which has usually mostly the same author. So far I've done 4 CDs. Using just one library. I also keep the original compressed downloads of important things in a different folder that also has subfolders for things like application installers, including old versions of those. Because disk space is cheap and just seems to keep getting cheaper.