You were suggested a card with two PCIe 3.0 x8 slots and one PCIe 3.0 x4 slot, all without sharing.
You were suggested a card with two PCIe 3.0 x8 slots and one PCIe 3.0 x4 slot, all without sharing.
There are only six SATA ports available. SATA express was an unusual connector typically seen on boards from the Z97 to Z370 range (perhaps slightly narrower than usual). It combined two SATA ports with an additional smaller port to create a PCIe Gen 3x2 interface. Since it wasn’t in use, it’s not applicable at all.