i use this. i know it says 32 gb sd card, but i put a 128 gb sd card in it and it works fine, though maybe that's because it only has 10 gb of data on it. the ui isn't perfect, i renamed all my files to be "[author last name], [first name] - [title] +the", but for some reason they're still alphabetized by the titles. i have no control over what books show up on the homescreen, it's just whatever i added most recently. still, it's a good size and it has color tempature lighting, which i like.