I just formated my laptop and I have copied mp3 files to
Libraries > Music folder.
Before this, when I copied mp3 files to this folder,they will
be automatically added to WMP.
But now, although the mp3 files are in the Music folder,
they are not in WMP.
Refer to tjis image:
(The are many mp3 files in Music folder, but they are not in
Windows Media Player)
So, how to make sure that the mp3 files are added automatically
into WIndows Media Player?