I'm using a Surface pro 7 laptop I had with an external usb HDD as a home server and in terms of performance it satisfies my every need want and desire.
That being said I would have liked to have more storage, maybe with some redundancy.

Is there any practical way to make several-disks-with-some-level-of-redundancy work through a single USB port?
Or at least "good enough" to the point where it would justify not buying new shit beyond the disks themselves.