Upgrade to b550 nvme gone...
Upgrade to b550 nvme gone...
it happened to me too. you should disconnect all other drives, then use a Windows install USB to put it on your SSD. it will erase everything, but at least it should function.
The issue is that the drive isn't shown in Windows, especially since you're using an old HDD. Did you overlook any BIOS configurations? It seems the M.2 slot isn't functioning, and you've checked both connections. Could be the SSD isn't compatible with your system.