Nook HD- How to Remove Downloaded Tracks from Hard Drive

[sixlookingup]

Greetings (and apologies if this has been previously addressed),

I recently installed Spotify on my Nook HD and unwittingly selected "download playlist" and 131 songs downloaded to my Nook's rather limited storage space. Streaming the tracks is more than adequate for what I need (in most) cases but I am having trouble finding the tracks in my files so that I can delete them and regain the storage space. Where do I need to go?

Thanks!