Plex music Sonic scan

Server Version#: 1.24.0.4930

Hello,
I bought the Plex pass to have a scan of my music further with the Sonic analysis. I have all my music in one folder, but only about 20 songs are well recognized. The rest is just the title, the rest is recognized as “various artists” "various album ". I would like to know how to solve this problem. I saw that by classifying the music by folder it can help to recognize , but this option is not possible, I have 6000 music and more than 700 artists, sorting all this by folder would take me months.
Someone have a solution ?

Thanks you,
Have a nice day

If your files have some kind of naming schema or use embedded metadata you could use apps like Filebot for the job.

Thanks you for your help !
But the tree structure is really mandatory? I have a lot of trouble understanding why this is necessary when he could very well recognize my music without it … my music is for the most part well recognized, but they are added to albums which do not correspond. Besides, we are obliged to have a presentation by album? Can’t we just have the titles and the artist?