The mainboard has an M.2 interface, which is listed as an internal interface. However, there is no exact information about the number of M.2 slots in the data material provided. According to official information from NZXT, the N7 Z790 has three M.2 slots, two of which support PCIe 4.0 x4 NVMe drives and one of which supports both PCIe 4.0 x4 and SATA.
As it stands, the product should still be available from us. However, there is currently no source of supply or it cannot be delivered to us due to a lack of stock. You are welcome to select "Notify me when available" to receive an e-mail notification as soon as the status changes.