Yep, my question is a bit badly written, this link to the Freecom drive might help:
FREECOM NETWORK DRIVE XS
So it looks like a standard external network hard drive but with a Gigabit LAN connection, that is all I was looking for initially, The WD should do fine as the Cloud option is useful while it remains live.
I have considered going down the DIY route with a spare drive and an original Raspberry Pi that’s currently gathering dust.
I’ll probably do both!