Check if your i5-2500K can run a Plex/file server.
Check if your i5-2500K can run a Plex/file server.
I personally tested that specific CPU and achieved multiple 1080p PLEX streams, including a share and a Minecraft server.
You'll be fine, File servers for home use need the reasorces of a potato and plex does very well on older hardware unless you are trying to transcode 4k. If your streaming locally with plex it normally will be able to direct stream and requires next to nothing to run.