Question SSD isn't showing up anymore

[Necrosaur]

2TB FireCuda (Mass storage for games.)
120GB SSD (Old Windows drive, has some Blender packages on it.)
240GB SSD (Blender and Unity drive.)
120GB M.2 NVMe (Windows 10)

After installing the M.2, my 240GB SSD isn't showing up. How can I get it to show up without removing any of the drives?

 

[Dark Lord of Tech]

Sometimes an M2 installation will disable at least one SATA III port.
Check manual for your board.