I just downloaded and installed the latest version of the Data Lifeguard Diagnostic for Windows (Version: v1.36) and my WDC WD10EURS-630AB1 no longer appears. Does this version not support this legacy drive? The previous version I had installed (1.24) recognized it.
As the Data Lifeguard Diagnostics for Windows supports WD AV Internal Hard drive. I would suggest reinstalling of the Data Lifeguard Diagnostic for Support site.
If not detects, you can refer below article for more options in this concern.