Hello,
sync it with pocketbook cloud on the android app pocketbook and only use dropbox connection to upload book you send to it.
Personally I use :
- Calibre with opds configurated
- copy the book to the dropbox application folder "Dropbox Pocketbook"
- or add calibre opds to the app android with virtuali library option and sync with pocketbook cloud (progression and book)
- send book to mail with Service Send-to-PocketBook :
https://www.mobileread.com/forums/sh...d.php?t=247639
- send book to device connected in usb with Calibre
and that's it !