To add an option Open with FolderSize to the Explorer context menu I added the following key to the registry:

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\Directory\shell\Open with FolderSize]

[HKEY_CLASSES_ROOT\Directory\shell\Open with FolderSize\command] @="\"C:\FileUtils\FolderSize\FolderSize.exe\" %1"

This works, but not for the root directory, like C:\. How can I add the option for the root as well?

1 Answer 1


[HKEY_CLASSES_ROOT\Drive\shell\Open with FolderSize]

  • While this may answer the question, it would be a better answer if you could provide some explanation why it does so.
    – DavidPostill
    Nov 25, 2015 at 21:12

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