Problems with sharing files between 2 workstations on the same network.

Yesterday though to put my other workstation to work, unused for around 1 year cuz bought a new one. Now i'm trying to share files between those two but doesn't seem to find anything on the network except "Media streaming", both are connected to the same router, connected to the internet, both on different IP (automatic detection) didn't use neither ipv4 or ipv6, but whenever i try to share a folder or hard drive on simple sharing or advanced sharing options can't find anything on the other workstation on the networking section. Anyone can help to figure this out? Thank you in advance.