Hey all.

I've got Plex et al. running comfortably on my OptiPlex after having a few things stolen I'm looking to set up 5 or so PoE Cameras so need a switch to handle it. I'm thinking 4k cameras so not sure if I can get by with an older switch that only does 100mbit but then do I need a gigabit port to send all that data to the server that will process it? or could I have a smaller POE switch that feeds into a gigabit switch? I'd love a few examples so I can keep an eye out online.

Beyond that, is it feasible to store and all that video in a separate NAS running purple DVR drives or am I better to use a USB3.2 DAS enclosure?