Now you're talking about me, huh?!

That's the very same way I've used for years now. I also keep backup copies of other reader app files (e.g. Vlasovsoft tools and KOReader) as archive files in a /files/ directory in the user-visible root (besides /documents/ ) in the case I must do a clean reinstall. The only thing I then have access to, is another computer (Linux, Windoze, doesn't matter...

) and an USB cable.