New to Home media - some basic questions

[Venson]

Hey @MaxFlax

Welcome to our forum.

1.
> Is that naming okay, or do I need to replace "_" with spaces " ".
Well this is a bit of a special scenario. As you already saw, jellyfin requires a specific naming convention if you want the metadata providers to pick up globally known media like movies. If you only use Home Videos, this is a non-issue and you can just disable all metadata providers in the Libaries settings.
2.
> What can be done when the Linux machine runs out of space, can I connect an external hard drive to it and store the additional files there?
Yes. You can stich Liberiers from as many paths you like.
3.
> How would all this work with Roku, after adding the Jellyfin app?
More or less the same as with the WebUI, just with an Ruku Jellyfin app.
4.
> I assume I'd have to log on with my Jellyfin account.
Yes the account you created on your jellyfin server
5.
> Does the Jellyfin app look on my home network for Jellyfin server and media files?
Partially. The network discovery can be a bit janky at times. It will only provide those files you added into your Jellyfin erver.