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In Windows 10 Search box type mmc and hit Enter key.
Under File of Console > Click Add/Remove Snap-in... > Select Disk Management under Available snap-ins > Click Add
S.Sengupta,Microsoft MVP Windows and Devices for IT, Windows Insider MVP
Besides the method that S.Sengupta mentioned, you could also right-click Start Menu button and select Computer Management.
Then, you could see Disk Management snap-in tool and other Administrative Tools.
Regards
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