The User Manager interface also allows you to merge email, FTP, and Web Disk accounts into a single Subaccount or link existing service accounts to Subaccounts.
Email
Email allows you to enable the Subaccount’s email address.
FTP
FTP allows you to manage your website’s files.
Web Disk
The Web Disk utility allows you to manage and manipulate files on your server in multiple types of interfaces (for example, your computer, mobile device, or certain types of software).