Quote:
Originally Posted by Epsilon Rose
The card will move between my PC and Boox TUC e-reader, based on what I'm doing, but it will likely spend most of its time in the e-reader.
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No, that's not how Calibre works. The ebook files only exist as ebook files because it's not viable to import the actual ebook content into an SQL database, esp. SQLight, so the actual SQL database file has the ebook file information. You need to treat the ebooks imported to Calibre as if they are invisible, except for backups.
There is a Calibre "Save to Disk" and that should be used with the SD card for the Ereader if not connecting it via USB. I connect my phones, tablets, ereaders etc via USB direct to Calibre and manage them. I backup the Calibre "system" including the private ebook files with rsync when Calibre is not running.
I've also tested the OPDS via Content Server and WiFi on one tablet running Pocketbook, but USB is simpler.
With Save to Disk, you can use templates to have any filestructure you want. But any ereader App (Moonreader, KOReader) that only uses a file system interface is like 1960s computing and gets very awkward with more than a few hundred titles. I found KOReader nearly unusable with 6,500. Also file organisation can't do collections (files would have to be duplicated) or series or multiple author titles easily.
You can't change how Calibre stores the imported ebooks, because those are ONLY for Calibre, they are part of the database.
I have about 7,000 ebooks and I'm happy with how Calibre works. Some people may have 60,000 or many more (maybe they can read half a dozen books a day or will live for 100s of years?).
The SD card has to have an export from the library, it's not the library, and you can use template to have the structure you want for Moonreader.