Thread: Touch How To Remove Book Covers
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Old 06-17-2014, 08:27 PM   #10
davidfor
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Posts: 24,905
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Join Date: Jul 2011
Location: Sydney, Australia
Device: Kobo:Touch,Glo, AuraH2O, GloHD,AuraONE, ClaraHD, Libra H2O; tolinoepos
Quote:
Originally Posted by TheArtfulDodger View Post
Hello:

I show that I have 1,050 books on my Kobo but the /.kobo-images folder shows 1,595 files!

However, Kobo Utilities said that only 8 images were excess, yet again there was no difference in the available space!.
As GeoffR said, there are multiple versions of the cover for each book. But, the device generates them as needed. Depending on what you have done with the book, there might not be any cover images, or there might be up to four. If you use calibre to send covers with the books, there should be all four versions of the cover. But, with those counts, you aren't doing that.

The .kobo-images directory only has covers for books on the main memory. This includes sideloaded books, books downloaded from Kobo and recommendations from Kobo.

Any time I have found a problem with extra covers, it is usually the recommendations. And something else usually has gone wrong. When I read your thread, I ran the cover check on my Glo. There were about 100 extras. All where covers for Kobos. I believe they were left behind after I restored a database from a few days before. This would have left orphaned images for recommendations that were not in the database.
Quote:
So, I moved 125 books from the Kobo to a 16GB micro SD card and the amount of spare space still didn't change! So, how is that possible?
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How big were the books? And how did you move them?
Can someone tell me what the KoboReader.sqlite file is - it is almost 128 MB!
As PeterT said, the database contains details about every book on the device. There is at least two rows per book. Plus one for each entry in the TOC for epubs and PDF and two for each TOC entry in a kepub. Some of these rows have a lot of information. For example, the full synopsis in in one of them. That can be a few KB. For curiosity, I pulled all the rows out for a kepub once. The was about 75KB of data for that one book. That didn't include any database overhead (indexes etc) or bookmarks or Beyond-The-Book entries.

But, 128MB seems big. I have about 1200 books and mine is about 24MB. The Kobo Utilities plugin mentioned has a database compress option. This might reduce size, but not always.
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