Library doesn't refresh automatically with added TV series episodes

Hi, I just created a library for TV series, but it doesn’t refresh with new episodes being added to the specified folder on my HDD. It’s still showing one episode I added upon creation of the library - the folder now contains more than 20 episodes.
I also ticked the box in the Plex settings that it should refresh but it doesn’t.

Some help would be much appreciated :slight_smile:

Cheers

Where do you run Plex server on?
Are the media files locally on the same device or on a network share (NAS)?
How are your episodes named and how are they organised into folders?