A:Answer Hello and thank you for asking. The HP M01-F3224 desktop PC (577L7AA) has two M.2 slots, one PCIe x16 expansion slot, and one PCIe x1 expansion slot. One M.2 slot has the 512GB SSD storage drive installed and the other M.2 slot has the wireless radio module for Wi-Fi 5 and Bluetooth connectivity. The motherboard does not have support for SATA connections.