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Question: Are the playlist-on-the-go files accessible from my computer?

I want to be able to access the playlist-on-the-go files from the computer (like to upload one of those playlists into my computer and write a script that deletes all of the songs in it).
are those files accessible from the computer? i can't seem to find them in the windows explorer.
or on the other hand - can i add files to playlists which are not on-the-go, without connecting to a computer?

would love an answer. thanks a lot guys!