Question about Amazon Kindle Special Offer (2019)

Moin Moin.... I can't answer that at the moment. For me, the decision to buy the Kindle was pretty clear because I had already had a Kindle account for years. The Tolino was out of the question because the formats are different and I can't read my Kindle books on it. I don't know if it's the same the other way round.

The formats PDF, TXT, DOC, DOCX, HTML, MOBI, AZW3, AZW, PRC can be transferred to the Kindle. With PDF, you practically always have to zoom in, so it's a bit impractical. You can download e-books in MOBI format from various sources.
The files can also be copied as if to a USB stick.