Jellyfin can't find my linux folder

[willicle]

I am extremely new to linux I started yesterday. I cannot for the life of me work out how this stupid stuff is meant to work. Jellyfin is downloaded and I am at the folder creation stage. I make a movie folder on the website, and it asks for a directory. I go make a folder  in my 1TB second hard drive and title it "Movies" (for movies). Jellyfin can't find it. Apparently it's to do with permissions. I try to fix the permissions, nothing. Then I try to change permissions in the command prompt and it says i dont have permission (despite everywhere online telling me it works), i try to make new folders in the prompt and again no permission. SO I have 3 issues, 1 jellyfin can't find a simple folder in /media/server1 , 2 I can't make new folders under any other directory (e.g /dbd) and 3. I can't change permissions.

I'm stumped what on earth do I do

Windows > Linux all the way is all i can figure out.