Well, there could be various reasons for a drive to become unresponsive or undetected. It can be a hardware issue or some technical glitch in the software.

Below are the few possible reasons for any drive being unresponsive:

1. A Lot of bad sectors
2. Infected File (Virus or Malware)
3. Driver issue
4. Mechanical failure

You can try the below options to resolve the issue:

1. Run CHKDSK
2. Use an Antivirus & Anti-Malware tool
3. Re-install the drivers

Hope this will help.

The link isn't doing anything for me. m.2 is a form factor; is the drive SATA or NVMe? Some m.2 slots only support NVMe and some support both. (and I suppose it's possible that some only support SATA, although I don't think I know of any such.) If it's a SATA m.2 drive, is it in a slot that supports SATA?