After reading another Forum post about drives incorrectly detected as SSD I temporarily changed settings to enable SSD detection, removable drives, and unmounted drives.
Defraggler Pro then displayed C: (SSD drive reserved for OS), D: (internal 1TB SATA hard drive), F: (external USB3 drive 2TB partition), G: (external USB3 Blu-ray Writer), and H: (virtual optical drive for mounting ISO and IMG files).
When I selected either D or F, Defraggler Pro warning incorrectly identified selected drive as SSD, actually SATA drives.
Drive E: is mapped memory slot for Canon PIXMA MX922 Multifunction Printer (MFC), Wi-Fi connected to 5G network.