Yes, move Windows to the NVME and use the SATA as storage. You can never have too much space.I have Asus prime z390 M Plus motherboard. 9900K cpu.
What do you use the system for?Should I buy M.2 NVMe SSD? I have 1TB SATA 3 SSD. Windows 10 is installed on that SATA 3 SSD.
Nothing because he's run out of spaceWhat do you use the system for?