Originally Posted by Khelbiros
When I sync ebooks to my ereader, they're set to be converted by Calibre into ePub. How do I disable this for some of the files, so that when I select 'Send to Device', some get transferred as ePubs and others remain as native PDFs?
The device driver for yor device has tick boxes for formats to send to your device.
Preferences Plugins device interface <your device family>