Copying MP3 Files to M6 Player

Can anyone help.
When I try and copy MP3 files from my laptop to my M6 Player, it shows them all as copied, and in Windows Explorer they show, but when you look on the player itself only a small number of the tracks are there.
Am I doing something wrong and is there a solution.
Thanks
Gerald

How many files have you copied?

Are they in the MUSIC folder?

What version firmware are you using?

if those songs appear in the Miniplayers "File Browser" but not in the Library, the missing ones might have no "id3 tag". You can apply that with a software like "mp3tag" (free).

I was trying to copy 18 tracks to the Artists Folder.
The Firmware version is 2.003.2

Thanks BobbyQ.
The mpstag software fixed the problem
Thanks Again