Calibre USB book transfer to Kobo Sage not working properly after upgrade.

[camifran]

Hi!

As the title says, I didn't have any problems before upgrading to Calibre 8, but now some books get recognized by the device and some do not, even though they get transferred to main memory.

I tried configuring the Kobotouch driver and changing the folder structure, it worked once but then for the next sync a lot of books weren't recognized again.

I convert them to kepubs while transferring.

Thanks for your help.