Secure alternative to robocopy for backups

Hey folks, like the title says. I'm looking for a secure utility for backing up files. I've currently hardcoded creds in a batch file in a system I've been handed and want to find a way to backup while removing these. I don't think robocopy has that ability, it's just straight forward copying. It's for an offsite location so am not looking for cloud backups, thanks.

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