You understood it perfectly. Thanks.
Side question then...why was someone insisting the 1st partition was the one that should be expanded? I guess because it is the one you "see" when the card is out of the Nook--but so what, as space added to 1st partition would be unusable as soon as it was back into the Nook, right?
Or is it that the OTHER folders (other than sdcard) belong to partition 1?
Here are the folders I see on mine, at root, using ES File Explorer...
I hope you understand, I am not trying to be a jerk. I am just really curious to understand how all this fits together. So, where might be the partitions for the other ones?
And how does one tell, other than just "knowing?"