I had imagined that the device being purchased was a Uniti Core!
We had a UnitiServe, but it didn’t last too long before the hard disk died. If your friend has bought one with a spinny disk tell them to be very careful with it, they are fragile. Once the disk dies they are basically scrap, as cost of repair (if still possible) is completely uneconomic.
Software to control the UnitiServe can also be an issue, as I recall it used flash which is no longer supported on modern desktop OS. I think we had to use a downloaded standalone flash player app, rather than browser interface.
naim ran a promotion a few years back where UnitiServe owners received a discount on a Core. I suspect this removed a good number of the UnitiServe which were still out there, although there are still a few forum members using these devices.
Our UnitiServe was converted to a Linux based media server, more for fun than necessity. We no longer use it.