Are you using Plex? What is your setup, hardware-wise? What else do you use?
I’m using a iMac as a server with a 5 TB sony external hard drive for storage. I also have a HD Homerun Connect Quatro that’s connected to a OTA outdoor antenna for local TV. I watch the content on a Sharp Roku TV in my living room and I have a Roku Premier on a older TV in the basement.