You could try a NAS then have a second NAS for backup beyond your normal backups.
What I see repeated too often are folk that try to get by without backup or call a single NAS a backup.
I am in the process of updating our office network, and I am looking to install some sort of server or networked storage. We only have 3 users in the office, but need something that will work quickly and be easily maintained. Suggestions? Ideas? I don't want to go overboard with this, but i need something reliable in case of disaster.