Once FTP is enabled, if the My Cloud is located in a remote location, one would also have to enable port forwarding (port 21) within the router/gateway the My Cloud is attached to. See the documentation for router/gateway for more information on how to configure that specific router/gateway for port forwarding.
Note that FTP is NOT secure. Typically the username/password is sent in the clear (i.e., unencrypted). There are various other threads that discuss methods of using SFTP or FTPS.
FTP is activated, and I am able to have append, retrieve, open files using the WD app.
so if I undertand, I have to make sure that port 21 is open for wd.
but I need the host: ex. ftp.cammy.com. and a username /password. There is no information about this is the library
FTP is separate and unrelated to the “WD app” (which ever one your using). Once FTP is enabled on the My Cloud, and port forwarding port 21 within the router/gateway is enabled (if needed); it is up to the FTP client within the camera or DVR/NVR to properly access the My Cloud’s embedded FTP server.
What model/brand camera are you using? Have you checked the camera’s user manual for more information on how to setup the camera to access a remote FTP server?