Not sure if anyone has received this yet but mine came last night. My first android security update since the May update this phone shipped with.
I am on the unlocked SM-G935U on the AT&T network. Patch level August 1, 2016 and rolled in around 147mb
That's strange. Every month there is a patch that comes out. This month patch was of around 151 MB for India users. If u hadn't received any of the previous month patches then the update package size would be much much higher.