Backups & restore points · Where backups go
Can I back up to a NAS or home server?
Short answer: Yes. Add the server as an SFTP, FTP or WebDAV account in Data Transfers and choose it as the destination, or pick a folder on a share already mounted in Finder.
Yes, in two ways. Connect the server as an SFTP, FTP or WebDAV account in Data Transfers and choose it as the destination, or — if the share is already mounted in Finder — choose a folder on it with Choose a folder….
Connecting it as an account is usually the more dependable choice, because the backup can reach it without the share having to be mounted in Finder first. Backups through an account are encrypted on your Mac before they leave it, and need a passphrase, like other cloud destinations.