Bios looks "stripped", there no optional section for sata m2, except to boot all sata devices https://nostr.build/i/nostr.build_dfb203a1db0ac49bd099b1b6afd28d78efd2e3673b8293dc2777184bb0524f82.jpeg ht...
If you put a LiveCD (or usb) with some distribution (ubuntu for example) it could be that it mounts the unit. maybe it is a matter of the configuration of your OS.