@ericadolphy said:
Plex should offer normal file-system supprt. There is NO reason to need all this specific file naming just to organize into artists and albums. Folders is WAY easier for everyone since you will never have to redo it.
DISCLAIMER: Take everything I say with a grain of salt. If I come across as a smart ass in any way, shape or form, GOOD! 'Cause in my line of work, the dumb ■■■■■ get the road time!.. wait, I still get road time! 
I am not associated with, nor speak for Plex and their employees in anyway. I only wish I knew half as much as these guys do in this field. Now, throw a Cisco 9010 in front of me and I can mpls, xconnect, explicit-path, bgp, etc, all night long (with some help, of course).
Plex likes to display to you, your library as user friendly as it can, with as much information as it can. Metadata helps it do that. Plex is designed to serve your media to you and uses a database to serve such media . It does NOT modify or add metadata to your files. Could it be done? I suppose it could but Plex programmers probably don’t want to modify your files, only serve them.
Metadata can be added to WAV files. It doesn’t have to be .flac, .mp3, .ogg, etc. Personally, I have all my audio in .flac 0 because I can hear just outside the ‘normal’ human range of hearing range and I can tell the difference between .flac 0 and .flac 5. But I also have them all in .mp3 as well because my car audio does not support .flac or .wav and only supports around 5,000 songs per media storage, regardless of the size of media or how many songs I may put on it. I keep 2 128G thumb drives in my car to listen to music when I drive, each with roughly half of my library. (Though I will probably go down to 64G x4 or 32G x8 because the initial load time of the library of a 128G of my car audio is a bit annoying 
)
You don’t have to redo your entire library by hand, per say. There are many programs out there that will search online for album, song and artist information. Granted, there are limitations as there may be 1,000 albums with Hello as the title. 15 of those albums are by the artist Good-bye with 5 of those albums containing the song Later but with 2 of those albums containing all of the tracks that is in your directory. Which does it choose? The artist Hello released 2 albums with identical track names but with various lengths and if it is live, etc. so there may need to be a little input from you. Another factor is if the album is even in print anymore, available in the US, UK, Germany, Japan, a special release, etc. The program I use for this is called Media Monkey (people will argue, this program or that program, it’s really about personal preference and experience). I drag my audio files into it, have it do a search, and click auto-tag if the search is correct; metadata added. If not, I choose US, Canada, Germany, France, Japan, etc, to see if it finds a match. I may have to give it more specific information to search. Or I can enter the information manually and apply it to a single song or all the songs. Sometimes I don’t like the album art so I Google search the artist, find one a like and manually add them. For example, any soundtrack I have, the artist is listed as the artist but I put the album artist as ‘Soundtrack’ and so on.
And in the time I’ve overly typed all of this and projected my unbiased <cough, cough> opinion, you could have searched and found several media tagging programs (some free, some trial based, some requires purchase), probably found one you are comfortable with and been well on your way to metadata tagging your audio collection.
