First do an internet search to learn how to use SSH and issue commands via the command line terminal. Second, to make things easier one can use a program like WinSCP (https://winscp.net/eng/index.php) to access the My Cloud via SSH and edit files. Again, do an internet search to learn how to use WinSCP.
Note: Proceed at your own risk!!!
The simple way is to edit the /etc/vsftpd.conf file to add the following two lines. In the example below the default My Cloud Shares; Public, SmartWare, TimeMachineBackup should be hidden to all FTP users who access the My Cloud via FTP. Restart the FTP server (or the entire My Cloud) after making the changes.
deny_file={Public,SmartWare,TimeMachineBackup}
hide_file={Public,SmartWare,TimeMachineBackup}
The above method is simplistic and would/should apply to all Users. The link below from the thread “How can I hide shares from FTP”, while for the My Book Live, should give one general pointers on how to do something similar on the My Cloud that may allow one to hide Shares for specific Users.
http://wdstagingsplit.staged-by-discourse.com/t/how-can-i-hide-shares-from-ftp/58170/2
