The program (Auslogics Disk Defrag) shows it's healthy.Could you try with Auslogics Disk Defrag Portable as well? Its readings are pretty accurate.
Every HDD diagnostics application that generates a verdict on an HDD's "health", relies on multiple statistical measurements, relative to certain "thresholds" (minimum/maximum allowed values, etc) which are set, of course, by the developers.
While it can be assumed that there are generally acceptable thresholds for every kind of reading, those thresholds may vary from application to application due to the way it was designed or internally configured by its developers.
As a result, while an application may report your disk as "being at full health", an other might suggest otherwise.
Not to mention a reasonable margin of error to which such applications are subject, which may or may not affect the end result of the applications' verdict.
The most reasonable way to determine a storage drive's health is to analyse it with as many reputable HDD/SSD diagnostics applications, and use use an average score, derived by considering every application's score.
It's got some nice GUI and other nice products on the site