Not a network professional here, just a home based business owner trying to upgrade his network. And from the looks of it, I made a wrong purchase decision back in 2018. From what I understood back then, I thought the SG350-10 had the capability for 10GBase-T (10gbe or 10gbs) networking on the last 2 ports (the combo RJ45 and SFP). So that when the time came that I would upgrade my Synology 1618+ with a 10gbe NIC and my desktop with a 10gbe NIC - I could connect to ports 9 or 10 via RJ45 and get 10gbe network speeds. It looks like upon reviewing the manuals again - I misunderstood.
BUT, I read a comment over Amazon
In the comments there is a mention that 10gbe CAN be engaged over the CLI (command line interface). I gave it a try, first time using CLI - but to no avail. Can someone verify if that is INDEED possible? Thanks!