I'm not sure if Peter is exactly on the same wavelength as you Rob.
I think you are wanting to plug your camera, etc into this box and remotely drive them with a computer from inside your house. Peter is saying he has the laptop in the observatory and dumps data wirelessly back inside his house to hard drives attached to this device (????) I have no idea whether this will do what you're wanting - but my suspicion is no (my reading of the specs said file and print server).
I think this is what you're after, but reading the blurb implies limitations (it mentions webcams negatively!)
link
DT