cant file my media files in my plex server share



so after using pex on my home computer for a few months i decided to build a server for my media. installing unraid and not having any luck with the docker i switched to freenas. i followed a youTube video ( ) for direction on how to install plex but i cant seem to find my shared media folders. iv been searching the forums and i found a discussion that was relevant but i didnt understand what they were talking about or how they the problem.
small words would be a big help with to explain how to fix this please