25 shelves possibly.
What's ridiculous is that Kobo themselves on the Glo homepage mention 30,000 books on a 32GB card. I'm only trying to hold around 1600 books (if that), which 98% epubs (and 1% txt files, and the last 1% pdf (which I'm in the process of converting to epubs anyway)), and the Glo struggles. I'm not trying to push the Glo anywhere near the 30,00 books that they have stated. Also, there's no small print (or otherwise) that I can see, that mentions anything about the device struggling with x amount of books.
I've tried:
- 25 shelves with around 50 books on each shelf - doesn't make a difference
5 shelves with around 300 books on each shelf - still no difference
I had at one point around 2000 books on the Glo, and "books" still loaded in 6 seconds, but "shelves" always struggles.
There are only two things left for me to try:
1. To convert all my pdfs to epubs, and see if that makes any difference. If not then:
2. Put 100 books on at a time, and monitor when the Glo "shelves" starts to struggle.
I don't think that it's unreasonable of me to expect my Glo to run smoothly with only 1600 books on it, especially when Kobo keep mentioning 30,000...