Hey,
Today i've found a video (it's in some kind of polish language, i can't understand it either but google translate helped me), it says a lot about the storage, he is in the menu in the review. Note that his 8s is full of apps, but what worries me is het next:
Other = 1 Gig
Apps = 400 MB
System = 1,91 Gig
Total available = 268 MB
His photos are stored on the SD, which is 32 gigs.
The phone states that it has 3,6 Gig of free memory, this is the way it's formatted, in fact it's 4 gigs but there is some kind of sophiticated counting system. As 1 gig is 1024 mb and so on. I don't get that story completely.
Anyway, here is the video. And the part of the memory is on 17:20