RBK40 Satellite Switch Performance?

I am considering buying an Orbi RBK40 system. I plan to have two computers and a Synology NAS in my office, wired to the Orbi Satellite, communicating with the Base on the other side of the house where the cable modem is (and currently my regular Wi-Fi router and the NAS).

Does anyone have a feel for how performant the Sateliite unit is as a switch, in terms of bandwidth between the computers and the NAS. I believe the ports are Gigabit, as are all the devices I would connect to it, but I would want the highest local wired performance (to make more use of the NAS for photo libraries etc.)

Happy to buy a small separate Gigabit switch if necessary, but not if I don't have to.