While Studio does not prevent you from inserting links that use a non-HTTP protocol, such as file:// or ftp://, using these types of links is not recommended.
Most modern browsers are configured by default to disallow file URLs on web pages retrieved over HTTP. This is a security precaution to ensure web pages cannot execute files on a user’s system.
When users click these types of links, the browser ignores them and does not display the link target.
Similarly, not all browsers are guaranteed to support FTP links, and users may not have FTP clients available to get access to content hosted over this protocol.
If users need to reach content on a file system or FTP server, it is recommended that you set up a configuration such as a web servlet to stream files through an HTTP interface. This allows all of your links to be secure HTTP links, and ensures consistent access for users with all browser configurations.