Hi Ted,
I run 2 ReadyNAS Duo V2 systems, one for myself personally, and one I've set up for non-tech savvy parents home office. My personal setup is mainly as a low power media server to my TV, but the one I've set up for my parents I've put together as something more along the lines of what you are thinking.
Whilst the ReadyNAS does come with built in automatic backup software, I was too lazy to set that up, so instead I've got my parents working directly off the NAS, basically all their files etc sit on the NAS. On top of that, I have a GoogleDrive (similar to dropbox) folder in the NAS, in which all their accounting data sits, so basically everything they work on is mirrored on the two drives in the NAS itself as well as being backed up online.
Ted the Kiwi said...
What I am after.....
1. A digital copy / backup of everything yup + cloud backup
2. Central access to data - a shared drive for photos, music, movies etc that can be shared between 1 desktop, 2 laptops, 2 iphones and an iPad. So it needs to be relatively quick as I want the shared drive to take over the machines hard drives. relatively quick, should be good for regular office stuff unless you are doing video editing... both my parents machines are pretty barebones but with 128gb SSDs to help them boogy. I can access mine and watch videos, drag drop files etc with my android phone, however don't think idevices let you do that... i believe there is an itunes server you can run to share media, but don't think it works with other files, but never tried it, seems cumbersome
3. Access to shared drives from anywhere - when I am on line yep
4. Work stuff that is mirrored immediately yep, this is why I have them working directly on the NAS
5. hot swapping of drives so its easy to upgrade and make copies for storage offsite yep
6. upgradeable as disc space becomes cheaper and bigger yep
7. Peace of mind and ease of use only issue i've come across so far is that because my parents are still on windows xp (hesitant to migrate them from something they are familiar with) if they lose power which happens reasonably regularly, they need to remap the NAS as a network drive, which means they have to figure out the IP address of the NAS, easy enough really.... no such issues with win7
If you are happy with a 2-bay setup, the Duo works pretty good for the price $307 for NAS + 2 x 1TB drives. Obviously if you pay more you get a faster machine, better processor, more bays.