Nejsi první, většinou se to stává u W10.
Nejlépe hodnocená odpověď je tato:

I found a fix to the mistaken SSD issue:
Windows relies on a registry value as an indicator that the drive is a normal hard drive or an SSD.
In Regedit, have a look at the key of:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\WinSAT

The Defragmenter will think the device is a SSD when the value is of RandomReadDiskScore is above a specific value.
Running the Command line of "winsat formal" will recalculate the value for the drive and in my case, the new value became RandomReadDiskScore = hex 65c (1628). The Defragmenter now runs on the drive which is no longer identified as an SSD !