Hi,
I have a Kobo Aura H2O currently running Software version: "3.19.5761 (oeo28f3185,12/29/15)", and my desktop operating system of choice is MacOSX.
I'm new to the whole ereader thing, and I was wondering if there was a way to create collections on the kobo using folders.

I bought it mainly for manga, and it treats every chapter as a separate book, this leads to the library become very cluttered. If I could have a collection for each manga series, it would make it a much easier device to use.

I noticed that there were some custom firmware/software (or something like that) for the Kobo ereaders, and I was wondering if maybe those would help me achieve my goal?
Someone recommended koreader to me, and I (think) that I need to use KSM for it. I was doing some research about KSM, but I couldn't really find much visual media showcasing it, like pictures, or even a youtube video. Is there a noob's quickstart guide to this?

Another thing I was wondering was, is it possible to switch the internal sdcard with a higher capacity one? I have a 64GB sdcard, and if I could have 2 in my reader (one internal, and one external), it would be very cool.

Thanks!