[PeterT]

Originally Posted by JimLL

Thanks. I have bookmarked it.

Does it tell what "Connect/Share" means, what it is used for and why it should be used?

Have you RTFM'ed?

http://manual.calibre-ebook.com/gui.html#connect-share

The Connect/Share action allows you to manually connect to a device or folder on your computer. It also allows you to set up you calibre library for access via a web browser or email.

The Connect/Share action has four variations, accessed by doing a right-click on the button.

1. Connect to folder: Allows you to connect to any folder on your computer as though it were a device and use all the facilities calibre has for devices with that folder. Useful if your device cannot be supported by calibre but is available as a USB disk.
2. Connect to iTunes: Allows you to connect to your iTunes books database as though it were a device. Once the books are sent to iTunes, you can use iTunes to make them available to your various iDevices. This is useful if you would rather not have calibre send books to your iDevice directly.
3. Start Content Server: Starts calibre‘s built-in web server. When started, your calibre library will be accessible via a web browser from the Internet (if you choose). You can configure how the web server is accessed by setting preferences at Preferences->Sharing->Sharing over the net
4. Setup email based sharing of books: Allows sharing of books and news feeds by email. After setting up email addresses for this option, calibre will send news updates and book updates to the entered email addresses. You can configure how calibre sends email by setting preferences at Preferences->Sharing->Sharing books by email. Once you have set up one or more email addresses, this menu entry will be replaced by menu entries to send books to the configured email addresses.