If you did not "Set Content" when you added a source, you can do so later by selecting the source and bringing up the contextual menu ( You can also "set content" for subfolders, even if the parent folder has content set that is using a different setting.For example, you can have a folder for your TV shows, and in that folder have a folder for "Star Trek" that contains the different Star Trek TV shows.You can Refresh or Update libraries to bring them up-to-date.Updating and Refreshing a library do different things.If you do this normally then Kodi will think that "Star Trek" is one single show, but if you set content on that specific folder, then it will scan everything in correctly.Avoid adding a subfolder as a separate source, as Kodi will might make duplicates if there are two sources that lead to the same files.Kodi can make your massive media collection easy to browse and play, but adding new media is a bit of a chore. Here they are, listed in terms of how easy they are to set up: None of these methods are particularly complicated, but the two add-ons are going to require a bit more effort, with Watchdog being the most work.By default, you need to manually tell the program to re-scan your folders every time you add something, which is annoying if you add new media regularly. In exchange for more complication, each option gives more flexibility than the last, so it’s worth going over all three.
If it finds new or unmatched media, it then scans it into the library and fetches metadata for it.
There are third party applications available for download from the internet that allow you to add and manage ID tags in your music files.
Kodi gives you the ability to listen to music from a variety of sources, click here for more information and examples of Types of Media Sources (link).
Once a library has been created, it is processed by your Plex Media Server so all the media items are matched and metadata is gathered.
As time goes on, you'll add and remove media to the libraries or make other changes that mean the library is no longer up-to-date.