[pjmpjm]

I've run Calibre for years on Windows, and up until recently thought that the newish builit-in 'Filehistory' utility in Windows was backing up my Calibre database. (I send my Filehistory data to an external hard drive.)

However, in checking Filehistory lately, I notice that it doesn't always include the book itself in each book's 'backup' file. Instead, in the book's individual folder, Filehistory will often include only the OPF and JPG (cover) files and not the EPUB or MOBI or other book file.

Can anyone with more detailed Filehistory and Calibre knowledge give me some advice?

In any case, I always keep a completely separate backup of my Calibre Library directory on a separate external hard drive.

Thanks in advance!