Back up

I have Fiber Optics from one building to the next and want a backup device like a snap server to send and store my backups.
Reason: When I am not here the Servers with tape drives never get changed. I also have Other Servers that have separate hardd Drives installed for the backups, but I want a second source as I mentioned above (fire, fire).
What is the best suggestion or advice you can give me on this.
Or Is Tape still the best solution.

Thanks