1. create a file field on Article let allowed audio file type.
2. Create a new article and assign an mp3 to the file field (Add media), then save it.
3. Edit this article again and click remove media, and then save.
what I understand is only the reference to the mp3 file is removed, but when I check media collection again, I found out that my mp3 file has gone?
And it's weird that this seems to happen only on audio file? if you repeat the 1,2,3 with and image file, the file is still there and everything is OK.