Which port is this connected to?
Only the M2_A can use that drive.
https://www.gigabyte.com/Motherboard/B450-AORUS-PRO-rev-10#sp
1 x M.2 connector (Socket 3, M key, type 2242/2260/2280/22110 SATA and PCIe 3.0 x4/x2 SSD support) (M2A_SOCKET)
1 x M.2 connector (Socket 3, M key, type 2242/2260/2280 PCIe 3.0 x2 SSD support)(M2B_SOCKET)
Which port is this connected to?
Only the M2_A can use that drive.
https://www.gigabyte.com/Motherboard/B450-AORUS-PRO-rev-10#sp
1 x M.2 connector (Socket 3, M key, type 2242/2260/2280/22110 SATA and PCIe 3.0 x4/x2 SSD support) (M2A_SOCKET)
1 x M.2 connector (Socket 3, M key, type 2242/2260/2280 PCIe 3.0 x2 SSD support)(M2B_SOCKET)