Hello Peter, I can access my NAS from the Internet. I'm taking website backups from my server to my local NAS.Can you access FTP or FTPS on your NAS from the Internet? Then you can directly backup to your FTP account on your NAS. Normally, opening port 21 on your router and maybe setting a route for incoming traffic to your NAS in your LAN is needed for that.
What you can do is to configure your NAS FTP storage space for a Plesk backup, so that the Plesk configuration and content is backed up to it.
You can address your FTP storage space on you NAS just like any other FTP space in the Plesk Backup Manager. As long as it is FTP or FTPS, you do not need any special software or upgrades. it does not matter whether the storage space is on your NAS or elsewhere, because the protocol is always the same.This can be with the "special" software or with linux commands ?
You can use a Software like Veeam Agent for Linux or Acronis (not the one you get as a Plesk extension, as this one only supports backups into the Acronis cloud) to perform a full server backup and store it on a remote network device like your NAS.
We often use Veeam for that and the free version will allow you to connect to a SMB or NFS target as backup destination. (should be supported by your NAS)
The only problem I see here, is that these connections may not be encrypted, well maybe except if you can use SMB3
The paid version of said software does also support object storages (s3 compatible), but I don't know of your NAS does. (out of the box of with an extension like MinIO)
(not the one you get as a Plesk extension, as this one only supports backups into the Acronis cloud)
Don't you want to store your server backup directly on your NAS?Can I do the transfer with tool like "winscp" (Free SFTP, SCP, S3 and FTP client for Windows) ?
Don't you want to transfer a backup directly from your server to your NAS?
Then why do need a tool like winscp?
If you only want to backup Plesk and its configuration, you can use the Plesk Backup Manager for it and simply backup to your NAS FTP.