Answers.Body: <p>In Preferences - Adding Books in Adding Actions tab there is a preference <code>Automatically convert added books to the current format</code> You need to click that off. The default is off.</p>
  
  <p><a href="https://i.sstatic.net/DClG8.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/DClG8.png" alt="enter image description here"></a></p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-09-03T12:49:04.213Z
Answers.Text: Thanks for the answer but that’s off already. Digging a little deeper, dragging the book onto Calibre does the following:
  - Copies it into Calibre’s library, removing the `.kepub` from the name
  - Creates a cover.jpg
  - Creates a metadata.opf
  The problem seems to come during the actual sync.
Answers.UserDisplayName: Robin Whittleton
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-09-03T12:53:28.777Z
Answers.Text: Looking on the device at the file Calibre copied over it differs in size (at least according to Finder on macOS). With the Lyrical Ballads kepub file linked in my question it’s 872,170 bytes in the Calibre libary, 871,652 bytes on the Kobo…
Answers.UserDisplayName: Robin Whittleton
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-09-03T19:57:42.737Z
Answers.Text: @Robin it seems to extract and generate the .opf and cover but the original is in the directory(ie the name without the extension) - to check this rubn ls or dir on the directory (depending on OS). I have convbeert off and non .epubs do have to be manually converted
Answers.UserDisplayName: mmmmmm
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-09-04T18:41:34.030Z
Answers.Text: OK, maybe I’m approaching this the wrong way. My problem is that loading a Standardebooks kepub ebook onto my Kobo through Calibre breaks the file, but dragging and dropping it into the storage manually works fine. So presumably Calibre’s doing something somewhere…
Answers.UserDisplayName: Robin Whittleton
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-10-06T00:47:22.753Z
Answers.Text: clicking it off  is not woking at all
Answers.UserDisplayName: Vidy Videni
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-09-03T09:06:54.170Z
Answers.LastActivityDate: 2017-09-03T09:06:54.170Z
Answers.UserDisplayName: mmmmmm
Body: <p>I’d like to use Calibre purely for librarying and sync, and I don’t want it do do any conversion between different ebook formats. It is possible to turn off autoconversion when syncing ebooks with my reader (Kobo Aura H2O)?</p>
  
  <p>To give a specific example, I’d like <a href="https://standardebooks.org/ebooks/fyodor-dostoevsky/crime-and-punishment/constance-garnett/dist/fyodor-dostoevsky_crime-and-punishment.kepub.epub" rel="noreferrer">the Kobo edition</a> of <a href="https://standardebooks.org/ebooks/fyodor-dostoevsky/crime-and-punishment/constance-garnett" rel="noreferrer">Standardebook’s Crime and Punishment</a> to not be converted to a normal EPUB on loading into Calibre, as it loses a chunk of formatting and the cover when synced. Manually sideloading it into my Kobo retains the cover, chapter progression markers etc etc. This is using latest Calibre (3.7).</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2017-09-02T10:28:17.670Z
Comments.Text: I don't know if you can switch it off, but I know that at least the original epub is preserved by calibre, so you could just restore the original EPUB via the edit metadata menu. Or write a program that traverses the library, looks for the `.original_epub` files and renames them back to `.epub` (after deleting the converted version). That should not take more than 10 lines of code.
Comments.UserDisplayName: Anthon
Tags: <calibre><conversion><kobo>
Title: Can I disable Calibre from doing any conversion?
UserDisplayName: Robin Whittleton
ThreadText: # Can I disable Calibre from doing any conversion?
  
  (Asked by: username_0 on 2017-09-02)
  
  I’d like to use Calibre purely for librarying and sync, and I don’t want it do do any conversion between different ebook formats. It is possible to turn off autoconversion when syncing ebooks with my reader (Kobo Aura H2O)?
  
  To give a specific example, I’d like [the Kobo edition](https://standardebooks.org/ebooks/fyodor-dostoevsky/crime-and-punishment/constance-garnett/dist/fyodor-dostoevsky_crime-and-punishment.kepub.epub) of [Standardebook’s Crime and Punishment](https://standardebooks.org/ebooks/fyodor-dostoevsky/crime-and-punishment/constance-garnett) to not be converted to a normal EPUB on loading into Calibre, as it loses a chunk of formatting and the cover when synced. Manually sideloading it into my Kobo retains the cover, chapter progression markers etc etc. This is using latest Calibre (3.7).
  
  **Tags:** calibre, conversion, kobo
  
  > **Comments:**
  > **username_1**: I don't know if you can switch it off, but I know that at least the original epub is preserved by calibre, so you could just restore the original EPUB via the edit metadata menu. Or write a program that traverses the library, looks for the `.original_epub` files and renames them back to `.epub` (after deleting the converted version). That should not take more than 10 lines of code.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_2 on 2017-09-03. Score: 2
  
  In Preferences - Adding Books in Adding Actions tab there is a preference `Automatically convert added books to the current format` You need to click that off. The default is off.
  
  [![enter image description here](https://i.sstatic.net/DClG8.png)](https://i.sstatic.net/DClG8.png)
  
  > **Comments:**
  > **username_0**: Thanks for the answer but that’s off already. Digging a little deeper, dragging the book onto Calibre does the following: - Copies it into Calibre’s library, removing the `.kepub` from the name - Creates a cover.jpg - Creates a metadata.opf The problem seems to come during the actual sync.  
  > **username_0**: Looking on the device at the file Calibre copied over it differs in size (at least according to Finder on macOS). With the Lyrical Ballads kepub file linked in my question it’s 872,170 bytes in the Calibre libary, 871,652 bytes on the Kobo…  
  > **username_2**: @Robin it seems to extract and generate the .opf and cover but the original is in the directory(ie the name without the extension) - to check this rubn ls or dir on the directory (depending on OS). I have convbeert off and non .epubs do have to be manually converted  
  > **username_0**: OK, maybe I’m approaching this the wrong way. My problem is that loading a Standardebooks kepub ebook onto my Kobo through Calibre breaks the file, but dragging and dropping it into the storage manually works fine. So presumably Calibre’s doing something somewhere…  
  > **username_3**: clicking it off  is not woking at all  
  
  ---
  
  