Quote:
Originally Posted by 2wr3ckl3ss
Thank you for the quick reply and the advice BR. I don't go looking at those files, but I do think about them. My computer is getting old (as am I) and I wanted to try and make it a little easier on her. I have over 8,000 books, which means an additional 16,000 files. People who say that shouldn't affect how a computer runs don't have a low-end 5 year old clunker with less than 4 GB over working RAM. I also back up my library online, and the only thing slower at indexing files than my Samsung is Google Drive. Like I said before, I knew the files where there for a reason, I just wanted to see to what degree they were necessary.
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11-year-old clunker here, with 2 GB RAM. My computer isn't feeling particularly sad about all those files.
As BetterRed said, the metadata.opf files are mandatory -- calibre uses them as a backup for the database.
The covers need to be stored outside the books in order to let calibre know about them -- calibre cannot keep re-extracting the covers from one of possibly several (!) formats every time it needs to display the metadata.