NAS for home

[Enquiries]

I want to set up a NAS for my home network. I have multiple HDD's full of media (Photos, Films, Music etc) as well as all my usual home documents. I would like to put them all together. So I can access from anywhere and also view media on my tv, music on my amp etc. I don't really know where to start, will my Sky router/modem be okay or do I need to upgrade to a differenet router and is there a specific type of NAS that would suit my needs?

Thanks for any help.