ESXi and Backup Storage

Hi all,
I have installed and configured ESXi 7 on my dedicated server. I also run Backup Storage (default 500GB) on my OVH panel. I received email with credentials and trying to add it as storage to my ESXi (under Storage > New Datastorage). I have entered all details (I think) but - i`m still receiving error message (without details:( ). I have enable access to my Backup Storage at CIFS, NFS and FTP for all my IP's. Any suggestion?

I only registered to write how to do this, because the documentation doesn't explain it properly.
If you use the CLI:
esxcfg-nas -a ovh-backup -o ftpback--.ovh.net -s /export/ftpbackup/mydedicatedserveron.ovh.net -v datastorenameonmyserver

If you do it on the GUI:
Use the name you want your datastore to appear as on the ESXi.
Use: **ftpback-
-.ovh.net** as host.
Use: /export/ftpbackup/mydedicatedserveron.ovh.net** as the share

Done!