Thanks for the responses and clarification.
To give a bit more context, I currently use HD Sentinel's "Status Window" on my desktop to monitor the health status of both my internal NVMe and my external HDD at a glance. (Screenshot below)
Since AIDA64 already reports the NVMe health properly, my goal was to eliminate HD Sentinel completely and rely solely on the AIDA64 SensorPanel to permanently display the health and temperatures of both drives in one place. This would also save resources by avoiding having an extra background program (Sentinel) running continuously.
It is very important for me to know if the external HDD suddenly drops in health or becomes unstable for the system. Having this visibility directly on the SensorPanel—without needing to run third-party software—would be extremely useful.
However, based on what you are saying, AIDA64 cannot calculate or estimate the health percentage for the magnetic drive in this setup—and if I understand correctly, there are no plans to implement health calculation algorithms for HDDs in future updates either, right?