Originally Posted by Salith
I've added the "Connect/Share" button to the toolbar, and added the tweak for the send-to folder (in this case, 'K:\\')
But the send to folder option is greyed out
I'm not sure what else to do to enable this feature.
You don't need to do anything special to enable the connect to folder feature. The fact it is greyed out means you are already using the feature and connected to the folder.
The only tweak for the Connect to folder feature is to automatically connect to a folder when calibre starts. If this isn't what you intend to happen every time you start calibre then remove the tweak. The tweak isn't required to use the connect to folder feature.