I keep my books on Dropbox and I can access them from my Kobo's. I have a Kobo Glo and a Kobo Aura and a Kobo Mini. All three of them can get to Dropbox and download a book.
It's clumsy but it's not difficult and it works just fine. I just checked and I have 128 meg of books on Dropbox at the moment. I have a free account there and I think it gives me 5 gig but maybe 2 gig. I don't recall now. I've been using it for years and I never had enough on it to have to think about how much capacity I have.
Barry
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