I have only twice tried to add ogg files to my SanDisk Ultra microSDHC 32Gb card I am using with my Sansa Clip Zip, and both times my player froze when it tried to play them.
I have simply copy/pasted the ogg files, so I didn’t use any software to manage the upload. When I upload mp3, I usually use Winamp player.
The ogg files are official soundtrack of games delivered with my purchase on www.gog.com.
Am I doing something wrong when I upload ogg files? The music plays without issue in VLC media player.