Not sure what you were doing. I would have copied the files from the usb-stick to a document folder on my Mac. When looking (not opening) them using finder they should be shown as ".epub". Then I would have installed calibre on my Mac. And then I would have opened calibre, created a new library in ANOTHER folder on my Mac and added / imported the files from the first folder into calibre using the "Add books" functionality. Now you should have a "valid" library on your Mac. The original files in the first folder mentioned above could now be deleted.
And now - at last - you should be able to modify etc. the books in your library and transfer them to your Kobo.
Is that the way you have done it?
Last edited by Grins; 02-11-2025 at 09:26 AM.
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