Hey!
I am a music producer and I run all my session off external SanDisk hard drives.
I'd love a single place I could plug in the drives that could back them up on mirrored drives. Is a NAS the best option for this? I don't really care about the cloud or internet connectivity, just a safe solution incase my drives fail.
You basically do the other way around. Buy a NAS for your primary storage since it provides redundancy (RAID) and that you can reach it from anywhere. Then you attach external drives to it for one of the backups of the data from the NAS. The second copy should go to another physical place. The cloud or a friends house. It’s called a 3-2-1 backup strategy.
Your local external backup is for quick recovery. Your offsite backup is in the event of a local catastrophe; fire, flood, hurricane/tornado, power surge, theft, etc. that takes out your NAS and local backup.