Here' what I've done. Two years ago I bought a Netgear ReadyNAS Duo - works with PC and MAC. There are several models which can handle the 3TB requirement. The ReadyNAS has RAID capabilities which can easily be configured to perform automatic backups to the secondary drives (and tertiary.... depending upon the model). Additionally, ReadyNAS is Squeezebox, SONOS, UPnP enabled should you want to go in that direction. If so, I would recommend the newer models - faster and Squeezebox supported Spotify due to the use of x86 architecture). There's a lot of information on the net regarding both the Netgear offerings and Squeezebox. Good luck. Love the convenience of my Transporter. Always re-descovering my CD collection and new music on Pandora and internet radio.
Newbie help how to store and backup iTunes library
It must be an age thing--pushing sixty and I can't make heads or tails out of the advice on the Computer Audiophile site. I just want to move my iTunes library from the internal hard drive on my Sony Vaio laptop to an external hard drive, and simultaneously back it up on another hard drive. I would like for the external drives each to have at least 3 TB of storage. I would like for them to be linked so that the backup drive regularly and automatically updates. And I'd like the drives to work with a Mac Mini, which I'm thinking about buying to use as a music server. If you can recommend specific hardware, I'd appreciate it. Or if I'm going about the storage-and-backup the wrong way, please set me straight. Thanks.