Dear Davidfor
thank you for the answer.
The device is a Kobo touch, and since I opened it and I found the SD card, for sure it's a N905B or C, but actually I wasn't able to find any label with the device exact model. my wife has basically the same book but on her's I can see the model number next to the USB connector. I attached a photo of the device mainboard, maybe you can give me a hint on how to understand it.
Thank you
Best regards
https://drive.google.com/file/d/1L6y...ew?usp=sharing