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Originally Posted by anacreon
After some vacillation, I just bought the H2o2 as a complement to the One - I find the 6" Glo HD is too small for me to read on nowadays though it is the best Kobo I've had otherwise (responsive and sharp screen thanks to IR), and the original H2o is heavy and awkward to hold, not to speak of no comfort light and annoying port cover, and has only 4 Gb which means I can't load all the books I have on the One.
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That's fairly close to my thoughts about the difference devices. And I had been wondering if the Aura H2O2 would be easier to hold than the original Aura H2O.
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All in all, I like the H2o2: much more comfortable to hold than the original, lighter, good screen, better casing than the One, and the 265 dpi is not a problem. But I won't be using it at night because I dislike the lemon tinge of the comfort light, and even by day with comfort light at 0, I find that that the light is lemon-y, and that the maximum is much darker than the One's.
I will mostly use it in transit or when I have to charge the One, and it might come in handy if my arthritic hands play up.
One thing surprised me: I uploaded all the books I have on the One except for 65 PDFs which add up to 340 Mb, and the available space is 2.6 Gb on the H2o2 and 1.4 Gb on the One. I cataloged the disks and found that the differences is in .kobo-images: 0.7 Gb instead of 1.7 Gb. I often use Kobo Utilities to clean off extra covers so I wonder - is it that images are created when I open books? Is there a way to eliminate all images and reload them to get 1 Gb extra when I am short (I added 0.4 Gb's worth of books in the last 5 months)?
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Yes, the cover images on the Aura ONE will be bigger. The resolution is much bigger, so the files will be as well. So, the space difference makes sense.
Unless you are sending the covers to the device with calibre, the device generates the covers as needed. It can generate them in three sizes. Basically, when you look at the book in the library, the cover for the list will be generated. But, it seems to generate the full size cover and then resizes that for the list. The third size is used for the details page, so it won't exist as often.
The Kobo Utilities plugin has an option to delete covers from the device. It will delete all three sizes for the selected books. But that means that the covers will be generated when you go through the library list and that will be slower. If you have a lot of books on the device it will save space until you do something that generates the cover again.
I have actually been thinking of this in the last few days. I'm pretty sure that if I delete the full size cover after the smaller covers have been generated, it will be regenerated when you read the book. That will save space and keep the performance. I have to do some experimenting, but if it works, I will add options to the cover deletion in the plugin to do this, and probably to the KoboTouch driver to only generate the smaller sizes and send them to the device. I think it will work, but I haven't done the experiments yet.