@DaltonST : So... I have the option of deleting the original copies of the books once they have been added to Calibre, then? I'm not sure that works, either, only because that means I have to consolidate all my books onto one drive and, as before, I don't have that kind of space. I'd need a 3TB drive or bigger to do that, and I don't have that kind of money at the moment. Still, it's good to know that's a possibility. I've already added over 3000 books to Calibre's library, but I think they are all from the same drive where the library is stored. I assume there's a way to move the library to another drive, somehow? Maybe if I can get a new bigger drive, I can put them all there? I have four external drives and one internal drive, all with books/comics on them at the moment, thus I was hoping for something that would just make a note of where they are located and grab them as needed, but I'll keep this in mind for sure. Thank you!
@theducks : and you are saying that the memory usage is temporary when adding books to the library. @jhowell above suggests that it duplicates the book in its entirety and even if Calibre does only use triple the memory temporarily, that only drops to double the memory used when adding a book. Is that correct? I'm happy to do small groups, if that helps, but it sounds like it won't in the long run.
And again, I'd love to get a bigger drive, but that's out of my spending range at the moment. I've got enough space on my drives for now for daily use (around 400GB total between them all) and I do a lot of audio and video editing, so I need to keep that semi free, but once I get the funds, absolutely, I'll upgrade like a fiend!
Thanks again to everyone for your responses! Cheers! This is all helpful. I certainly have a better understanding of how the program works and generates the library information; sadly, it's still not sounding like there's a feasible solution, yet, though, without a much, much, much bigger hard drive. I'll keep thinking on it and see what I can sort out. Thanks again! You all rock! \m/