SSDs may still be seen and treated as hard drives, even in the latest Windows 10, if within a USB housing combined with interface-restricted (e.g. USB 2.0) speed.
This echoes the old difficulties with SSDs in Windows 7, which we hoped were history. I discovered this unexpected issue when attaching a SATA SSD within USB enclosure via a USB 2.0 powered hub, and suspect two factors are at work; USB blocking SATA storage identification, and the constrained speed causing the WEI engine to report the storage as "too slow to be an SSD".
The result; right-clicking the drive and going Tools, Optimize shows Defrag rather than Optimize for the drive letters on the externally-connected SSD.
You could use this issue to deliberately Defrag an SSD, as may be required to solve an NTFS problem, where there are too many fragmented cluster chains to hold as NTFS Extents. Hopefully this would be before NTFS has already blindly painted itself into a corner, from which ChkDsk fails to "fix".
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