There should be an metadata.
opf for every book (I assume that's 7748), as there are 7748 cover.
jpg files, but there are only 3,352 .
opf files. You could fix that via the
calibredb backup_metadata --all command.
Apart from the .jpg and .opf counts, do the file counts from Linux match with the counts in the Tag Browser Format counts, e.g. EPUB 7,775 files, HTMLZ 113, KEPUB 7,748 MBP 12 etc. If not you need to get that sorted out:
- Either by running the calibredb check_library --csv command and surgically culling the 'dross' formats and adding the 'lost' formats
- Or by brute force by moving what the library database knows about into an empty library and dealing with what's left.
BR