The first track in the folder shown below in my SonicTransporter AT I7 - 7TB is not added to the meta data
I have only used approx 4% of the capacity of the storage. 8956 tracks - 640 albums
My guess is that the description is too long. Notice that track 10 with very similar, but shorter description is picked up. (It cuts the text after the hyphen
This is the structure and text as downloaded from HDTracks.
I have not tried to edit the text (yet) to see if I can make it appear under the album.