Plenty of possibilities here and these folks often have such things also. If you like Amazon (I know some people see them as the arm of Satan) they have numerous possibilities.

I have no experience of buying NAS stuff, but kept the references from earlier investigations into maybe going that way. During my reading I am pretty sure that Netgear had good press with one proviso: that the internal software was all proprietary, working like raid, but not compatible. I don't really recall the details, but do remember that I was slightly shy of getting tied to that product. I expect you will find what I was reading if you do a bit of searching on line.